Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Physiology > Cardiovascular > Flashcards

Cardiovascular Flashcards

(47 cards)

Start Studying
1
Q

Heart

A

Muscular organ
Bw 2 lungs in mediating
2 atria and 2 ventricle
Ventricle-more thick

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

SV node on

A

Right atrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

SV node

A

Produce cardiac Impulse
And AV node conduct it to ventricle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

2 venacava

A

SVC-venous blood from head,neck and upper limbs
IVC-venous blood from lower parts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Oxygenated blood

A

Arterial blood

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Rightside

A

Venous blood(right atrium)-pulmonary artery-lungs-arterial blood(left atrium)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Svvalves in both sides

A

Tricuspid in right side
Bicuspid/mitral valve on left side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Layers of walls of heart

A

Outer pericardium
Middle myocardium
Inner endocardium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Pericardium

A

Outer covering of heart
2 layers-outer fibrous as tunica advertising,protect heart from overstretching

Inner-serous
Made of flattened epithelial cells
Outer parietal pericardium -lines fibrous layer
Inner visceral pericardium/epicardium-lines surface of myocardium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Pericardial space

A

Space bw parietal and visceral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

3 muscle fibres inMyocardium

A

-forming contractile unit of the heart
-forming pacemaker that initiate impulse for contraction
-forming conducive system through which impulse are conducted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Endocardium

A

Inner layer
Thin,smooth,glistening membrane
Single layer of endothelial cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Actions of heart

A

Chronotropic
Inotropic
Dromotropic
Bathmotropic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Actions of heart

A

Chronotropic-Frequency of heart beat or heart rate
Increase or decrease
*Inotropic-force of contraction of heart
+ve increase in force
-ve Decrease in force
*dromotropic-conduction of impulse through heart
+ve increase in velocity
-ve Decrease in velocity
*bathmotropic-excitability of cardiac muscle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Blood vessels

A

Arterial-aorta,arteries, arterioles
Venous-venules,veins,venacavae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Wall of aorta and arteries

A

Tunica adventitia-formed of connective tissue
Tunica media-smooth muscles
Tunica intima-endothelium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Circulation

A

Systemic
Pulmonary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Systemic Circulation

A

Greater circulation
Blood-through different blood vessels-aorta,larger arteries,smaller arteries, arterioles-arterioles into capillary-venules smaller veins,larger veins,venacava

Oxygenated or arterial blood from heart to tissues
Deoxygenated or venous blood from tissues to heart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Function of capillaries

Study These Flashcards
A

Exchange of various substances bw blood and tissues
Bcz wall of capillaries is permeable to various substances

20
Q

Pulmonary circulation

Study These Flashcards
A

Lesser circulation
Right ventricle-pulmonary artery-lungs(diffusion through pulmonary capillary membrane)-pulmonary vein

21
Q

Properties of cardiac muscles

Study These Flashcards
A

Excitability
Rythmicity
Conductivity
Contractility

22
Q

Conductivity property

Study These Flashcards
A

Specialized conductive system that transmit impulsesproduced by SA node transmitted to all parts

23
Q

Conductive system in heart

Study These Flashcards
A

AV node
Bundle of his
Right and left bundle branches
Purkinje fibres

24
Q

SA node. Mode of conduction

Study These Flashcards
A

Situated in right atrium just below the opening of superior venacava
Conducted to AV node by 3 types of internodal fibres
1,anterior
2, middle
3,posterior

25
Way of conduction through conductive system
SA node-inernodal fibres-converge at AVn9de and is interdigitated with nodes of AV node-bundle of His arise from AV node -divides into right and left branches-branches on either side of interventricular septum -purkinje fibres spread over all over the ventricular myocardium
26
Contractility property. Affected by which factors
Ability of tissue to shorten in length after receiving a stimuli All or none law
27
All or none law
If a certain stimulus is applied, whatever the strength of the stimulus , It may respond with maximum response or do not give any response at all
28
Reason why the muscle doesn't respond in account with all or none law
Maybe the strength of stimulus is not adequate
29
Cardiac cycle
Succession of every coordinated activities which takes place every heartbeat Each and every heartbeat consists of 2 periods-systolic and diastol -During systole ,contraction of cardiac muscles and pumping of blood from the heart -During diastole, relaxation of muscle and filling of blood These changes repeated on every heartbeat in cyclic manner
30
Division of cardiac cycle
Atrial systole and atrial diastole-contraction and relaxation of both atria Ventricular systole and Ventricular diastole -contraction amd relaxation of both ventricle
31
Duration of cardiac cycle
Systole -0.3 sec Diastole-0.5sec Total -0.8 sec
32
Relation bw atrial systole and atrial diastole
Atrial systole -0.1 sec Atrial diastole-0.7 sec Atrial systole during last phase 9f Ventricular diastole Atrial diastole coincide with Ventricular systole and earlier stages of Ventricular diastole
33
Events of cardiac cycle described by
W.r.t atrial systole
34
The events
Atrial systole Isometric contraction period Ejection period Protodiastole Isometric relaxation period Rapid filling Slow filling
35
Atrial systole
Duration-0.11 sec Second or last rapid filling phase Last phase of Ventricular diastole 10% blood is forced into ventricle from atria Intra atrial pressure increased, intra Ventricular pressure and Ventricular volume slightly ^,
36
Isometric contraction
First phase of Ventricular systole Duration-0.05 sec Atrioventricular Valve /semilunar valve is closed after atrial systole Ventricular pressure ^ No change in Ventricular volume and length of muscle fibres Tension in Ventricular musculature ^ -pressure ^sharply inside the ventricle
37
Ejection period
Duration-0.22 sec Opening of semilunar valve and contraction of ventricle, blood ejected out of each ventricle 2 stages Rapid-0.13sec (blood ejected rapidly) Slow-0.09 sec (blood ejected slowly)
38
Protodiastole
End of systole and beginning of diastole Duration-0.04 sec Ejection of blood cause pressure in aorta and pulmonary artery ^ and that of ventricle drops Semilunar valves close No other change
39
Isometric relaxation
Duration-0.08 sec All valves are closed No change in volume or length of muscle fibre-both ventricle relax Fal in intra Ventricular pressure
40
Rapid filling
70%filling Duration-0.11 sec AV valve opens when pressure in atria less than that of ventricle Sudden rush of blood to ventricle
41
Slow filling
Duration-0.19 sec Also called diastasis 20% filling Ventricular filling slow after rush of blood from atria
42
Heart sound
Mechanical activities during each cardiac cycle produce sounds called heart sound Produced by -Blood flow through the chambers -cardiac muscle -Valves of heart
43
Heart sounds
4 heart sounds are produced First-lubb 2nd-dubb 3rd -through microphone 4th-inaudible, through phonocarciogram
44
First heart sound
Simultaneous closure of AV valve Produced during isometric contraction period and earlier part of Ejection period
45
2nd heart sound
Onset of diastole Simultaneous closure of both semilunar valve Sound -short,shaped,low pitched sound
46
3rd heart sound
Low pitched Rapid filling of cardiac cycle Not heard normally Children and athletes, heard through stethoscope
47
4th heart sound
Produced during atrial systole Physiological atrial sound Inaudible sound

Physiology (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions