anatomy exam 2 Flashcards
(264 cards)
1
Q
what part of the body makes up the area between the neck and abdomen, includes the cavity enclosed by the ribs, sternum, dorsal vertebrae, and contains the chief organs of circulation and respiration?
A
thorax (made up of mediastinum and L/R pleural compartments)
2
Q
what is the floor of the thorax made up of and it is convex or concave?
A
- respiratory diaphragm
- convex superiorly
3
Q
what are the 4 functions of the thorax?
A
- protect vital thoracic / abdominal organs from external forces
- resists the negative internal pressure created by the elastic recoil of the lungs
- provides attachments for and support the weight of the upper limbs
- provide the origin for some upper limb muscles and attachments for muscles of the abdomen, neck, back, and respiration
4
Q
what vertebrae make up the TRUE ribs and what are they characterized by?
A
- ribs 1-7
- attach vertebrae to sternum via costal cartilage
5
Q
what vertebrae make up the FALSE ribs and what are they characterized by?
A
- ribs 8-10
- have cartilage attached to the cartilages of ribs superior (rib 7)
6
Q
what vertebrae make up the FLOATING ribs and what are they characterized by?
A
- ribs 11, 12
- have cartilage ending in the posterior abdominal wall musculature
7
Q
what are the cartilages of ribs 7-10 joined to form?
A
infrasternal angle
8
Q
what are ribs and costal cartilages separated by?
A
intercostal space
9
Q
what structure of the thorax is bounded by the 1st thoracic vertebrae, 1st pair of ribs, and superior border of manubrium?
A
superior thoracic aperture
10
Q
what structure of the thorax is closed by the diaphragm and makes it so that structures must pass through the diaphragm or behind it?
A
inferior thoracic aperture
11
Q
where does the head of a rib atriculate?
A
articulates with inferior and superior costal facets of adjacent thoracic vertebrae (vertebrae with same number as rib and number above it)
12
Q
where does the tubercle of a rib articulate?
A
articulates with facets on transverse process of vertebrae (same as number of rib)
13
Q
where are intercostal vessels running along a rib?
A
costal groove
14
Q
what can supernumerary (cervical) ribs cause?
A
thoracic outlet syndrome
NOTE - cause compression, injury, or irritation of the brachial plexus and/or subclavian vessels in the lower neck and upper chest
15
Q
what is scoliosis generally described as being?
A
abnormal lateral curvature of the spine
16
Q
what are the 4 types of scoliosis and what are they caused by?
A
- congenital scoliosis - bone abnormality present at birth
- neuromuscular scoliosis - abnormal muscles or nerves (frequently seen in people with various conditions that can result in paralysis)
- degenerative scoliosis - result from traumatic bone collapse, back surgery, osteoporosis
- idiopathic scoliosis - most common type (strong evidence suggests its inherited)
17
Q
how does each type of ribs (true, false, and floating) move within costotransverse joints?
A
- upper ribs (1-7) - rotate at the costotransverse joints
- lower ribs (8-10) - glide at the costotransverse joints
- ribs (11, 12) - do not articulate with transverse processes
18
Q
what type of joints are primary cartilaginous joints and do not usually experience movement?
A
costochondral joints
19
Q
what muscles occupy the intercostal spaces and function during respiration and what is their function?
A
- intercostal muscles
- move the ribs and help to keep the intercostal spaces rigid
20
Q
what are the three types of intercostal muscles?
A
- external intercostals
- internal intercostals
- innermost intercostals
- subcostal
- transverse thoracis
21
Q
in which direction do the fibers of external intercostals run?
A
- infero-anteriorly
(hands in pockets - run downward and inward)
22
Q
what muscles function to elevate ribs during forced inspiration?
A
external intercostals
23
Q
what muscles function to depress the ribs during forced respiration?
A
internal and innermost intercostals
24
Q
what layers of intercostal muscles do intercostal vessels (nerve, vein, artery) run between?
A
internal and innermost intercostals
25
what intercostal muscles run in the same orientation and blend with internal and innermost intercostals (also likely have same function)?
subcostalis
26
what intercostal muscle is located on the sternum and functions to depress ribs?
transversus thoracis
27
what are the three muscles that we do not usually used for quiet breathing but can be recruited and used in struggled breaths?
- levator costae
- serratus posterior superior
- serratus posterior inferior
28
what rami do intercostal nerves become?
ventral rami
29
what is the term used to describe an area of skin supplied by nerves from a single spinal root?
- dermatome
NOTE - tiger stripes follow dermatomes
30
what is the term for a surgical procedure where a surgical opening is made through the thoracic wall to access the lungs, heart, esophagus, diaphragm, and thoracic aorta?
thoracotomy
31
what is the term used to describe a procedure to remove fluid from the space between the lining of the outside of the lungs (pleura) and the wall of the chest?
thoracentesis
NOTE - needle going OVER TOP of rib
32
where is a needle inserted when administrating a intercostal nerve block?
BELOW the rib
33
what is the term for a procedure used primarily diagnose the specific source of nerve root pain and for therapeutic relief of low back / leg pain
nerve root block
34
what is the spatial relationship of the intercostal vessels in the intercostal space?
- vein
- artery
- nerve
35
muscles raise the ribs during _______?
inspiration
36
what do we see when we have an increase in thoracic volume and a decrease in pressure?
air flows IN
37
what do we see when we have a decrease in thoracic volume and an increase in pressure?
air is pushed OUT
38
what muscles are working during inspiration?
- external intercostals contract
- diaphragm contracts
NOTE - chest wall and lungs expand, expansions of ribs moves sternum upward and outward
39
what muscles are working during expiration?
- interna/ innermost intercostals and abdominals contract
- diaphragm relaxes
NOTE - chest cavity and lungs contract, ribs and sternum depress
40
where is the primary blood supply to the thoracic wall derived from?
derived from branches of the aorta and subclavian arteries (which are also branches of aorta)
41
where do internal thoracic arteries arise from and what do they give rise to?
- arise from subclavian artery near its origin
- give off anterior intercostal 1-6
42
what does the internal thoracic artery divide into after ending at the 6th costal cartilage?
musculophrenic and superior epigastric arteries
43
where do the anterior intercostals 7-10 arise from?
musculophrenic arteries
44
_______ will drain back to the musclophrenic or internal thoracic veins
intercostal veins
45
what do anterior intercostal arteries anastomose with in the intercostal space?
posterior intercostal arteries from the descending thoracic aorta
46
where does venous drainage from the right side of the body drain into?
azygous vein (goes to superior vena cava)
47
where does venous drainage from the left side of the body drain into?
hemiazygous and accessary hemiazygous veins
EXCEPTION - left superior intercostal
48
what part of the thoracic cavity is a movable median partition of the thoracic cavity that extends superiorly to the thoracic outlet/ root of the neck and inferiorly to the respiratory diaphragm... it extends anteriorly to the sternum and posteriorly to the vertebral bodies?
mediastinum
49
what part of the thoracic cavity is made up of skeletal muscle and lined by pleura (superiorly) and peritoneum (inferiorly) that separates the thoracic and abdominal viscera?
respiratory diaphragm
50
what two parts is the mediastimum divided into (imaginary plane runs from the sternal angle to the T4 vertebrae)?
superior and inferior mediastinum
51
what compartment of the mediastinum is bounded anteriorly by the manubrium and posteriorly by vertebral bodies of T1-T4?
superior mediastinum
52
what compartment of the mediastinum is bounded anteriorly by the body of the sternum and posteriorly by the vertebral bodies of the lower 8 thoracic vertebrae (can be further divided into other compartments)?
inferior mediastinum
53
what compartment of the mediastinum makes up the space between the pericardium and the sternum?
anterior mediastinum
54
what compartment of the mediastinum is made up of the pericardium and heart?
middle mediastinum
55
what compartment of the mediastinum is between the pericardium and the vertebral column?
posterior mediastinum
56
what structure in the thoracic cavity separates the thoracic cavity from the abdominal cavity?
respiratory diaphragm
57
what three structures pass between the thorax and abdomen and pierce the diaphragm?
1. inferior vena cava
2. aorta
3. esophagus
58
what is the most important muscle in respiration?
respiratory diaphragm
59
what is the term for the musculotendinous bands that arise from the anterior surface of L1-3/ IVDs and the anterior longitudinal ligament... which one is longer?
- cura (singular = crus)
- right crus is larger and longer (L1-L3/4)
- left crus (L1-L2/3)
60
the median arcuate ligament united the crura and forms the ________?
aortic hiatus
61
what is the term for the thickening of fascia (psoas major) in reference to attachments of the respiratory diaphragm?
medial arcuate ligament
62
what is the term for the thickening of fascia (quadratus lumborum) in reference to attachments of the respiratory diaphragm?
lateral arcuate ligament
63
what is the mnemonic for knowing the structures that pierce through the diaphragm and where their respective openings are?
"I ate ten eggs at noon"
- (inferior) caval hiatus - T8
- esophageal hiatus - T10
- aortic hiatus - T12
64
what is the respiratory diaphragm innervated by?
somatic motor - phrenic nerve (C3-5)
65
what types of sensory information can the phrenic nerve carry?
pain and proprioception
66
peripheral parts of the diaphragm can receive some sensory innervation from _______?
lower intercostal nerves
67
what occurs (size-wise) to thoracic cavity during inhalation?
- rib cage expands as rib muscles contract (volume increased)
- diaphragm contracts and moves down (height increased
- NOTE - pressure is DECREASED (AIR FLOWS IN)
68
what occurs (size-wise) to thoracic cavity during exhalation?
- rib cage gets smaller as rib muscles relax (volume decreased)
- diaphragm relaxes (height decreased
- NOTE - pressure is INCREASED (AIR FLOWS OUT)
69
what branches from the internal thoracic artery and thoracic aorta give rise to arterial supply on the superior surface of the respiratory diaphragm?
- internal thoracic artery - musculophreic and pericardiacophrenic
- thoracic aorta - superior phrenic
70
what branches from the abdominal aorta give rise to arterial supply on the superior surface of the respiratory diaphragm?
- abdominal aorta - inferior phrenic
71
where do musculophreic and pericardiacophrenic veins drain into for venous drainage on the superior surface of the respiratory diaphragm?
drain into internal thoracic vein
72
where does the right superior phrenic vein drain into for venous drainage on the superior surface of the respiratory diaphragm?
drains into inferior vena cava
73
where do veins from the posterior curvature drain into on the superior surface of the respiratory diaphragm?
drain into azygous and hemi-azygous veins
74
where does the R inferior phrenic vein and the L inferior phrenic veins drain into on the inferior surface of the respiratory diaphragm?
- R inferior phrenic vein - inferior vena cava
- L inferior phrenic vein - inferior vena cava or L supareal vein
75
which pleura layer is adhered to lung, continuous with parietal pleura at root of lung?
visceral pleura
76
which pleura layer line the thoracic cavity?
parietal pleurae
77
what is the term for the potential space between layers of pleura that contains a small amount of serous pleural fluid?
pleural cavity
78
what is the function of serous pleural fluid?
- lubricates pleural surfaces
- allows layers to slide smoothly over one another during respiration
79
what is the term for when we change from one area of parietal pleura to another?
reflection
80
what do we call the areas where the lung does not completely fill the pleural cavity and where parietal pleurae can appose each other (occupied by the lungs only on forced, deep inspirations)?
pleural recesses
81
what are the two consistently present pleural recesses and from which one are we more likely to take a sample from?
- costodiaphragmatic - slit like space between costal and diaphragmatic pleurae, along the inferior border of the lung which enters through it in deep inspriation
- costomediastinal - slit like space between costal and mediastinal pleurae, along the anterior border of the lung which enters into it in deep inspiration (blood can pool here - samples taken from this area)
82
what is the term used to describe a procedure done to remove excess fluid from the pleural space to help you breathe better?
pleural effusion
83
what is the term used to describe pus in the pleural space?
empyema
84
what is the term used to describe blood in the pleural space?
hemothorax
85
what is the term used to describe air between the layers of partial pleura lining the chest wall and the visceral pleura covering the lung?
pneumothorax
86
what are symptoms of tension pneumothorax?
- chest pain
- shortness of breath
- rapid heart rate
- shallow breathing
- anxiety
- blue or ashen skin
87
what sources provide the arterial supply for the visceral pleura?
branches of the bronchial and pulmonary arterial systems
88
where do veins drin into when talking about blood supply/ drainage to the visceral pleura?
drain into the azygous/ hemiazygous veins and some to the pulmonary vein
89
where do bronchial arteries arise from?
thoracic aorta (1-2 for each lung)
90
what do bronchial arteries supply oxygenated blood to?
non-respiratory tissues of the lung and visceral pleura
91
where do bronchial veins carry blood to?
- 13% of bronchial venous blood to systemic venous circuit
- 87% of bronchial venous blood drains to pulmonary venous circuit desaturated the left atrium blood by 1%
NOTE - pulmonary vein carries OXYGENATED BLOOD
92
what type of vessels supplies the cervical and costal pleura (in terms of blood supply)?
intercostal vessels
93
what type of vessels supplies the diaphragmatic and mediastinal pleura (in terms of blood supply)?
- diaphragmatic pleura- intercostal vessels (periphery) and percardiacophrenic vessels (central tendon)
- mediastinal pleura - percardiacophrenic vessels
94
what would be the pattern of venous drainage from the parietal pleura?
companion veins of the arterial supply
95
what nerve supply is provided to the viscera pleura?
NO NERVE SUPPLY - it is not innervated
96
what innervates the cervical and costal pleural of parietal pleura?
intercostal nerves
97
what innervates the diaphragmatic and mediastinal pleura?
- diaphragmatic pleura - intercostal nerves and phrenic nerves (central tendon)
- mediastinal pleura - phrenic nerves
98
what are 5 functions of the respiratory system?
- conducts and conditions inspired air
- gas exchange between air and blood
- olfaction
- phonation
- defense (role in immune system)
99
development of the respiratory system beings in week 4 with the appearance of _______
respiratory (or laryngeotracheal) diverticulum
100
what do the primary bronchi develop into?
right and left lungs
101
what do the secondary or lobar bronchi develop into?
number of lobes (right = 3 & left = 2)
102
what is the pleural cavity made up of that surrounds each lung?
formed by visceral and parietal pleura
103
what part of the lung is covered by cervical pleura and projects 2-3 cm through the superior thoracic aperture into the root of neck?
apex
104
what part of the lung is against the dome of the diaphragm?
diaphragmatic surface of base
105
what part of the lung is adjacent to the sternum, costal cartilages, ribs, and vertebrae?
costal surface
106
what part of the lung is adjacent to the mediastinum?
mediastinal surface
107
what part of the lung is where costal and mediastinal surfaces meet anteriorly and overlap the heart (inferior border)?
anterior border
108
what part of the lung is where costal and mediastinal surfaces meet broad and rounded?
posterior border
109
how many lobes does the right lung have and what fissures separate them?
3 lobes (superior, middle, inferior)
- oblique fissure between middle/ inferior
- horizontal fissure between superior/ middle
110
how many lobes does the left lung have and what fissures separate them?
2 lobes (superior and inferior)
- separated by oblique fissure
111
what two unique features are characteristics of the left lung?
- cardiac notch
- lingula
112
what term refers to the structures contained in the pulmonary sleeve and entering the hilum of the lung?
root of the lung
113
what term refers to the area where the structures forming the root of the lung actually touch lung tissue?
hilum of the lung
114
what is the term for where the mediastinal pleura passes laterally from the mediastinum to the visceral surface of the lung (becomes visceral pleura)?
pulmonary ligament
115
what type of blood do pulmonary arteries carry?
deoxygenated blood (taking blood from the heart to lungs to pick up oxygen)
116
what type of blood do pulmonary veins carry?
oxygenated blood
117
what type of tissue lines primary bronchi?
respiratory epithelium - pseudostraitifed columnar epithelium with goblet cells
118
in what bronchi do aspirated items tend to fall into?
right main bronchi
119
what is the term used to describe the anatomical, functional, and surgical unit (subdivision) of the lungs?
bronchopulmonary segments
120
what are the two main functions of bronchopulmonary segments?
- can limit spread of infection
- more easily removed
121
where is the primary site of gas exchange within the respiratory system?
alveoli
122
what types of innervation are found in the lungs?
sympathetic, parasympathetic, visceral afferent (sensory)
123
where is parasympathetic innervation derived from?
vagus nerve
NOTE - contraction of bronchial smooth muscle and vasodilation of pulmonary vessels
124
where is sympathetic innervation derived from in regard to the pericardium?
thoracic splanchnic nerves (cardiopulmonary)
NOTE - relaxation of the bronchial smooth muscle, vasoconstriction of the pulmonary vessels
125
how are visceral afferents/ sensory received in regard to the lungs?
conduct pain impulses to the sensory ganglion of the vagus nerve
126
what medical condition is due to an overactive parasympathetic system?
asthma
NOTE - treatments minimic what sympathetics do
127
order of lymphatic drainage
- lymph drains
- pulmonary nodes in lung
- bronchopulmonary nodes (hilum)
- tracheobronchial nodes
- L/R bronchomediastinal trunks
128
what medical condition is due to an infection in the alveoli and reduces capacity for gas exchange?
pneumonia
129
what medical condition is a smoking-related disease that is characterized by the loss of alveoli available for gas exchange due to destruction of elastic tissue and the inability to stretch and recoil?
emphysema
130
what is a visible characteristic of emphysema?
barrel chest
131
where does lung cancer originate?
in epithelium
132
what can the inferior mediastinum be divided into?
- anterior mediastinum
- middle mediastinum
- posterior mediastinum
133
where is the thymus in children located?
superior mediastinum
134
what organ contributes to the development and maintenance of the immune system in children?
thymus
135
what is the thymus replaced by as we age?
fatty tissue
136
what arteries supply blood to the thymus?
internal thoracic arteries
137
what veins drain blood from the thymus?
- internal thoracic veins
- L/R brachiocephalic veins
138
what do the left and right brachiocephalic veins come together to form?
superior vena cava
139
name the (three) great vessels of the heart and identify where they lie
- arch of aorta
- pulmonary trunk
- superior vena ava
- lie within superior mediastinum and main branches arise before passing through superior thoracic aperture
140
the superior vena cava returns blood from all structures superior of the diaphragm except for the ______ and _______
lungs and heart
141
what are the 4 tributaries of the superior vena cava?
- brachiocephalic veins : draining blood from the upper body
- left superior intercostal vein : collects blood from 2nd and 3rd intercostal vein, drains into left brachiocephalic vein
- supreme intercostal vein : drains the vein from first intercostal space into brachiocephalic veins
- azygous vein : receiving blood from the right posterior intercostal veins
142
what 2 veins come together to form the brachiocephalic veins?
internal jugular and subclavian
143
what structure exists from the right ventricle and bifurcates into the L/R pulmonary arteries?
pulmonary trunk
144
what structure branches into the L/R coronary arteries and gives rise to brachiocephalic artery, left common carotid, and left subclavian artery?
aorta
145
what does the right brachiocephalic artery give rise to?
- right common carotid
- right subclavian
146
what is the anatomical (lateral vs medial) difference between vagus and phrenic nerves?
- lateral = phrenic nerves
- medial = vagus nerve
147
what do the left and right vagus nerves give rise to?
left and right recurrent laryngeal nerves
148
which recurrent laryngeal nerve hooks around right subclavian artery and ascends between the trachea and esophagus to supply the brain?
right recurrent laryngeal
149
which recurrent laryngeal nerve arises from left vagus nerve as it passes the aortic arch... loops under the arch to the left of the ligamentum arteriosum before continuing up to the larynx?
left recurrent laryngeal
150
what veins and arteries do the vagus nerve travel along in the neck?
- internal jugular veins
- common carotid arteries
151
which side (left vs right) is the anterior vagal trunk continuous with?
left
NOTE - vagus goes through diaphragm with esophagus at T10
152
which side (left vs right) is the posterior vagal trunk continuous with?
right
NOTE - vagus goes through diaphragm with esophagus at T10
153
which recurrent laryngeal nerve does NOT enter the mediastinum?
right recurrent laryngeal (hooks around the right subclavian artery)
154
which recurrent laryngeal nerve is more likely to be affected if disease process present in thoracic cavity?
left recurrent laryngeal
155
what structure is a fibrous remnant of the fetal blood vessel that connects the left pulmonary artery to the descending aorta (ductus arteriosus)?
ligamentum arteriosum
156
what type of innervation do the phrenic nerves supply?
- motor to diaphragm
- sensory to mediastinal and diaphragmatic pleura
157
what nerve that supplies the mediastinum enters the superior mediastinum lateral to the great vessels and then descends anteriorly to the hilum of the lungs?
phrenic nerve
158
what nerves originate from the superior, middle, and inferior cardiac ganglia and form the superficial/ deep plexuses in the superior mediastinum?
cardiac nerves
- superior plexus : sits between aortic arch and right pulmonary vein
- deep plexus : lies on the surface of the trachea at the point of bifurcation
159
what nerve structure runs bilateral the the vertebral bodies along the entire length of the vertebral column?
sympathetic trunk
160
what respiratory structure descends anterior to the esophagus, ends at the level of the sterna angle, and divides into the L/R primary brochi?
trachea
161
what structures are located within the posterior mediastinum?
- oesophagus
- descending thoracic aorta
- thoracic duct
- azygous and hemiazygous veins
- sympathetic trunk
162
what structure begins at the inferior border of T4 and becomes the abdominal aorta after passing through the aortic hiatus (T12)?
thoracic aorta
163
what areas does the thoracic aorta supply?
- intercostal spaces
- thoracic viscera
164
what structure sits posterior to the arch of the aorta and passes through the esophageal hiatus (digestive function)?
esophagus
165
what duct is the largest lymphatic duct channel in the body?
thoracic duct
166
where does the thoracic duct originate from?
cisterna chyli
167
where does the thoracic duct drain into?
union of left internal jugular veins and subclavian veins
168
where does the thoracic duct drain lymph from?
whole body EXCEPT right side of head/ neck, right upper limb, and right side of thorax/ upper surface of liver
169
where does lymph from the right side of head/ neck, right upper limb, and right side of thorax/ upper surface of liver drain into?
right jugular, subclavian, and broncomediastinal trunks which enter veins on the right side of the neck as the right lymphatic duct
170
where do the superficial tissues of the chest wall drain into (lymphatic drainage)?
axillary and internal thoracic nodes
171
where do deeper tissues of the chest wall drain into? (lymphatic drainage)
internal thoracic intercostal and diaphragmatic nodes... subsequently into the thoracic duct
172
where does the heart drain into (lymphatic drainage)?
lymphatic vessels that follow the coronary arteries and ultimately drain into the inferior tracheobronchial nodes
NOTE - both sides draining... danger of metastasis of cancer from one side of the body to the other
173
where do deep lymphatics of the lungs drain into (lymphatic drainage)?
follow air passages
174
what is the term for the fibrous sac surrounding the heart?
pericardium
175
what are the 3 attachment (fusion) sites of the pericardium and what do these sites help to prevent?
- fuses superiorly with tunica adventitia of SVC, ascending aorta, and pulmonary arteries
- fused inferiorly with central tendon of the diaphragm
- reinforced by 2 sternopericardial ligaments that attach the pericardium to the tracheal bifurcation and main bronchi
- keep the heart in position and limit cardiac distention
176
the pericardium contacts the posterior surface of the sternum and ____________
4th and 5th intercostal space
177
where are the phrenic nerves located in relationship to the mediastinal pleura and pericardium?
in between the layers
178
what is the outer layer of dense connective tissue covering the heart called?
fibrous pericardium
179
what are the two layers below the fibrous pericardium of the heart?
parietal and visceral pleura
180
what is the term for the enclosed sac with a potential space between the parietal and visceral layers?
pericardial cavity
181
what is the function of the fluid located within the pericardial cavity?
enables the heart to beat in a relatively frictionless environment
182
what function does the pericardium serve?
prevents sudden overfilling
183
what is another term for the visceral layer of the serous pericardium?
epicardium
184
what are the two sinuses of the heart called?
- transverse sinus - separates the venous and arterial ends
- oblique sinus - gives smooth area for frictionless movement within the pericardial cavity
185
name the structures that supply blood to the pericardium
- pericardiacophrenic arteries
- musculophrenic arteries
- branches of the thoracic aorta
- coronary arteries (visceral layer only)
186
name the sites of venous drainage from the pericardium
- pericardiacophrenic veins
- internal thoracic veins
- tributaries of the azygous system
187
what type of innervation is supplied to the fibrous and parietal layers of the pericardium via the phrenic nerves?
somatic sensory
188
what type of innervation is supplied to the epicardium via the cardiac plexuses?
visceral sensory
NOTE - epicardium is insensitive to pain
189
what is the term used to describe inflammation what occurs when the irritated layers of the pericardium rub against each other?
pericarditis
190
what is the term used to describe the presence of an abnormal amount of fluid and/or abnormal character to fluid in the pericardial space?
pericardial effusion
191
what is the term used to describe a build-up of fluid around heart than applies pressure and may prevent the heart from pumping effectively?
cardiac tamponade
192
what are the filling chambers of the heart?
artia
193
what are the pumping chambers of the heart?
ventricles
194
if you were stabbed on the left side of the chest in the 4th intercostal space, what area of the heart is most likely damaged?
right ventricle
195
what venous structure carries deoxygenated blood from the heart muscle back to the right atrium?
coronary sinus
196
what is the smooth walled part of the right atrium that received the venae cavae and coronary sinus?
sinus venarum
197
what muscle makes up the rough looking wall within the right ventricle made up of?
pectinate muscles
198
what separates the pectinate muscles from the sinus venarum?
crosta terminalis
199
what occurs as a result of a patent foramen ovale?
- allows oxygenated blood to be shunted to the right atrium
- the right atrium, right ventricle, and pulmonary trunk will become enlarged
200
the right ventricle receives blood from the right atrium via the ________
right AV valve OR tricuspid valve
201
what are the irregular muscular elevations on the internal surface of the right ventricle termed?
trabeculae carneae
202
what are the names of the cusps that makeup the tricuspid valve?
- anterior cusp
- posterior cusp
- septal cusp
203
what is the connection from the anterior cusp that extends to the interventricular septum termed and why is it important?
- septomarginal trabeculum
- part of the internal conduction system runs through the septomarginal trabeculum
204
what structure helps to hold AV valves closed during contraction to prevent prolapse?
chordae tendineae
205
explain what is occurring with the AV and semilunar valves during ventricular diastole?
- AV: open
- semilunar: closed
NOTE - heart is filling, NOT contracting
206
explain what is occurring with the AV and semilunar valves during ventricular systole?
- AV: closed
- semilunar: open
NOTE - heart is contracting to pump blood to body
207
where does the left atrium receive oxygenated blood from?
the lungs via four pulmonary veins
208
the left ventricle receives blood from the left atrium via the ________
left AV valve OR mitral (bicuspid) valve
209
the wall of the left ventricle is 2x as ______ as the wall of the right ventricle
thick
210
what is the area called that leads into the aorta (hint- smooth walled)?
aortic vestibule
211
what is the term used to describe an opening between the left and right ventricles associated with shunting of blood?
ventricular septal defects
212
most VSDs occur in ________ portion (these spontaneously close)
muscular
213
________ ________ in VSDs are more commonly corrected surgically
membranous defects
214
what are the two cusps that make up the mitral (bicuspid) valve?
- anterior cusp
- posterior cusp
215
what valve is the MOST COMMON diseased valve of the hart?
mitral (bicuspid) valve
216
what can prolapse result in?
- enlargement of the left atrium due to blood leakage during contraction
217
what is a defining characteristic of semilunar valves that makes them different from AV valves (what do semilunar valves NOT have)?
- papillary muscles
- chordae tendineae
218
how many cusps do the pulmonary and aortic valves have?
3 cusps which help to prevent backflow into the ventricles during ventricular relaxation
219
what is the term for the point at the midpoint of its free edge in a semilunar valve cusp?
nodule
220
what is the term for the thin connective tissue area on either side of the nodule of semilunar valve?
lunule
221
what arises from the aortic sinuses within the semilunar valve in the aorta?
coronary arteries
222
what are the cusps positions for the aortic semilunar valve?
right, left, and posterior
223
what are the cusps positions for the pulmonary semilunar valve?
right, left, and anterior
224
what parts of the heart do the coronary arteries supply?
myocardium and epicardium
225
what do the right and left coronary arteries arise from?
right and left aortic sinuses
226
what does the right coronary artery give rise to?
- right marginal artery
- posterior interventricular artery (gives rise to the AV nodal artery)
227
what does the left coronary artery give rise to?
- circumflex artery
- anterior interventricular artery (left anterior descending artery)
228
what type of anastomoses do coronary arteries create to help protect heart in case of emergency?
- intercoronary arteries (branches between left and right coronary arteries)
- intracoronary arteries (branches from same artery)
229
what are the 4 branches of the right coronary artery?
- SA nodal (60%)
- right marginal artery
- AV nodal
- posterior interventricular
230
what parts of the heart does the right coronary artery supply?
- right atrium
- right ventricle
- posterior 1/3 interventricular septum
- SA and AV nodes
231
what are the 2 branches of the left coronary artery?
- anterior interventricular (left anterior descending)
- circumflex (gives rise to left marginal)
232
what parts of the heart does the left coronary artery supply?
- left atrium
- left ventricle
- portion of right ventricle
- interventricular septum (anterior 2/3)
- AV node
- SA node (40% - from circumflex)
233
what section of the left coronary artery gives rise to these structures:
- left atrium
- left ventricle
- SA node (40%
- AV node (10-15%)
234
where does the right coronary artery run?
coronary sulcus
235
what does the right marginal artery supply?
supplies right ventricle (does not reach apex)
236
what is the most common occluded coronary artery?
anterior interventricular (left anterior descending)
237
how is dominance defined?
by the artery that gives rise to the posterior interventricular artery
238
what is the term used to describe when the RCA and LCA both give branches that course in or near the posterior interventricular groove (18%)
co-dominance
239
what is the term used to describe lipid deposits in the lining of the coronary arteries?
coronary atherosclerosis
240
what is the term used to describe the sudden occlusion of a major artery?
myocardinal infarction
241
how does a myocardial infarction affect the tissue of the heart supplied by that artery?
infarcted (bloodless) and necrotic (tissue death)
242
what is the most common cause of a myocardial infarction?
coronary artery insufficiency from atherosclerosis
243
what is the heart drained by that empties into the right atrium?
coronary sinus
244
what small veins from the heart can drain directly into the right atrium?
anterior cardiac veins
245
what are the three main veins that drain into the coronary sinus and ultimately the right atrium?
- great cardiac vein
- middle cardiac vein
- small cardiac vein
246
what artery does the great cardiac vein run with?
anterior interventricular (left anterior interventricular)
247
what artery does the middle cardiac vein run with?
posterior interventricular
248
what artery does the small cardiac vein run with?
right marginal artery
249
what structure/ part of the heart initiates cardiac muscle contraction and determined heart rate?
SA node
250
what is the flow of cardiac conduction?
- SA node
- AV node
- bundle of His
- purkinje fibers (L/R bundles)
251
what is the SA and AV nods made up of?
modified cardiac myocytes
252
where are preganglionic sympathetic cell bodies located in the spinal cord?
lateral horns of spinal cord in T1-T5 segments
253
where are postganglionic cell bodies located in regard to sympathetic innervation to the heart?
cervical and superior thoracic paravertebral ganglia
254
what is the term for postsynaptic fibers that innervate the heart?
cardiopulmonary (thoracic) splanchnic nerves
255
what type of innervation is responsible for increasing heart rate, impulse conduction, force of heart beat, and blood flow in the coronary arteries?
sympathetic innervation
256
what gives rise to parasympathetic innervation via preganglionic fibers to the heart?
vagus nerve
257
where are postganglionic cells located in regard to parasympathetic innervation for cardiac tissue?
within cardiac tissue
258
what type of innervation is responsible for decreasing heart rate, force of contraction, and constricting coronary arteries?
parasympathetic innervation
259
what pathway does visceral pain pathways for the heart follow back?
sympathetic pathways backward
260
visceral sensory pathways that lower blood pressure and slow the heart rate are carried by the _______ _______
vagus nerve
261
in fetal circulation, what structures are branches of the internal iliac arteries and carry unoxygenated blood AWAY from the fetus?
2 umbilical arteries
262
in fetal circulation, what structures carry oxygenated blood from the placenta to the fetus?
1 umbilical vein
263
in fetal circulation, blood from the IVC flows into the right atrium toward the ________ _________ and into the left atrium
foramen ovale
264
in fetal circulation, blood from the SVC flows into the right atrium toward the tricuspid valve and into the right ventricle pulmonary trunk
blood in the pulmonary trunk is shunted to the aorta via the ______ ________
ductus arteriosus
