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Cardiovascular > Anatomy 4 > Flashcards

Anatomy 4 Flashcards

(81 cards)

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1
Q
A
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2
Q

The right atrium forms

A

The right border

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3
Q

The right auricle projects & overlaps

A

Projects forwards & to the left
It overlaps the ascending aorta

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4
Q

The interior of the right atrium is divided into 2 parts

A

1) Atrium proper
2) Sinus Venarum

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5
Q

The 2 parts of the right atrium, artrium proper & sinus Venarum, are demarcated from each other by

A

Crista Terminalis

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6
Q

A muscular ridge extending between the openings of the SVC & IVC

A

Cvista Terminalis

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7
Q

Crista terminalis corresponds to

A

Sulcus terminalis is indentified on the external surface

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8
Q

The anterior rough part of the right atrium

A

Atrium proper

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9
Q

Atrium proper is rough due to

A

The presence of muscular ridges called musculi pectinati, extending from the crista terminalis up to the right auricle.

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10
Q

The posterior smooth part of the right atrium

A

Sinus Venarum

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11
Q

Sinus Venarum receives the following openings

A

1) Opening of SVC
2) Opening of IVC
3) Opening of Coronary Sinus
4) Openings of anterior cardiac veins & venae cordis minimi

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12
Q

The tricuspid orifice is a part of

A

The Right Atrium

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13
Q

The interatrial septum is oblique & presents 2 features

A

1) Fossa Ovalis
2) Annulus Ovalis

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14
Q

Location of Fossa Ovalis

A

Above& to the left of the IVC orifice

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15
Q

Annulus Ovalis also known as limbus fossa Ovalis is

A

The raised, curved margin of the fossa Ovalis

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16
Q

Right ventricle forms

A

The inferior border

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17
Q

Thickness at the right ventricle

A

9mm thick

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18
Q

The cavity of the right ventricle is ___, because…

A

Semilunar
The interventricular septum is convex to the right

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19
Q

The cavity of the right ventricle is divided into

A

1) Inflow Part
Through the tricuspid orifice
2) Outflow Part
Leads to the pulmonary orifice

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20
Q

The outflow part of the right ventricle has smooth walls & is called

A

Infundibulum
OR
Conus arteriosus

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21
Q

Trabeculae carneae of the right ventricle

A

Muscular ridges (Sponge like) & few and coarse in appearance

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22
Q

Small, conical muscular projections attached by their bases to the walls of the ventricle

A

Papillary muscles

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23
Q

The apices of papillary muscles give origin to

A

Chordae tendinae

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24
Q
A
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Connects the papillary muscle to the cusps of the AV valve
Chordae Tendinae
26
Each papillary muscle is attached to
2 adjacent cusps
27
There are 3 papillary muscles
1) Anterior papillary muscle 2) Posterior papillary muscle 3) Septal papillary muscles
28
Its chorda tendinae are attached to anterior & posterior cusps of the tricuspid valve
Anterior papillary muscle
29
Smaller connected to the posterior & septal cusps
Posterior papillary muscle
30
Their chordae tendinae are attached to the anterior & septal cusps
Septal papillary muscles
31
A muscular band which extends from the interventricular septum to the base of the anterior papillary muscle
Septomarginal trabecula (Moderator band)
32
Function of the septomarginal trabecula
1) Prevent overdistention of the right ventricle 2) Transmit right branch of Hiss bundle to the wall of the right ventricle
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35
Oval apreture between the right atrium & right ventricle
Right atrioventricular orifice
36
The right atrioventricular orifice is surrounded by & guarded by
Surrounded by a fibrous ring Guarded by the right tricuspid valve
37
The right atrioventricular valve has 3 cusps
Anterior, posterior, & septal
38
The anterior cusp at the right atrioventricular valve separates
The AV orifice from the infundibulum
39
Circular aperture, situated at the upper end of the infundibulum, leading to the pulmonary trunk
Pulmonary Orifice
40
The pulmonary orifice is surrounded by & guarded by
Surrounded by a fibrous ring Guarded by the pulmonary valve
41
The pulmonary valve has 3 semilunar cusps
2 anterior & 1 posterior attached to the fibrous ring surrounding the pulmonary orifice
42
Forms the major part of both the base & the upper border of the heart
Left Atrium
43
Projects forward from its upper left part & overlaps the root of the pulmonary trunk
Left auricle
44
Posteriorly, the left atrium is
Seperated from the descending thoracic aorta & esophagus by the oblique sinus of the pericardium & the fibrous pericardium
45
The cavity of the left atrium is
Smooth with a few musculi pectinati in the left auricle
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48
Orifices in the left atrium
1) 4 pulmonary veins 2) Left atrioventricular orifice 3) Venae cordis minimi
49
Forms most of the left aspect of the heart & the left 1 & 1/2cm of the inferior border as well as the apex of the heart
Left Ventricle
50
Thickness of the left ventricle
27mm thick, 3 times more thicker than the right
51
The left ventricle has a
Rounded cross section
52
The cavity of the left ventricle is divided into
1) Inflow Part 2) Outflow Part
53
The rough part extending from the left atrioventricular orifice to the apex of the heart
Inflow part of the left ventricle
54
Smooth part extending upwards from the apex of the heart to the aortic orifice
Outflow part of the left ventricle
55
The inflow part of the left ventricle has
1) Trabeculae carneae More numerous & finer 2) Papillary muscles Anterior & Posterior papillary muscles
56
The walls of the outflow part of the left ventricle are formed of
Fibrous tissue to remain patent during ventricular systole
57
Mitral (bicuspid) valves consists of
2 cusps, anterior & posterior
58
The anterior cusp of the mitral valve is
The larger cusp
59
The posterior cusp is smaller than the anterior & is placed
Behind & to the left of the AV valve
60
The posterior mitral cusp gives
Attachment to the chordae tendinae by its margin as well as its ventricular surface
61
The upper part of the outflow part of the left ventricle is called
Aortic Vestibule
62
Aortic orifice (a circular orifice) is surrounded by & guarded by
Surrounded by a fibrous ring Guarded by the aortic value
63
The aortic valve consists of
3 cusps, 2 posterior & 1 anterior
64
Just above the aortic orifice, the wall of the ascending aorta presents 3 dilatations called
Aortic Sinuses
65
The right ventricle is_ in cross section
Semilunar
66
The left ventricle is_ in cross section
Circular
67
The outflow part of the right ventricle is
The infundibulum
68
The outflow part of the left ventricle is
The aortic vestibule
69
The moderator band of the left ventricle
No moderator band
70
The 2 valves of the right ventricular
Tricuspid & Pulmonary
71
The 2 valves of the left ventricular
Mitral & Aortic
72
The moderator band of the right ventricle
Right branch of the AV bundle
73
Seperates the 2 ventricles from each other
Interventricular Septum
74
The interventricular septum is directed
Obliquely backwards to the right & curved with the convexity toward the right ventricle
75
The margins of the interventricular septum corresponds with
The anterior & posterior interventricular sulci
76
The lower part of the interventricular septum is thick, is called
Muscular Part
77
The upper part of the interventricular septum is much smaller & thin, it is called
Membranous part
78
The SA node lies
In the lateral wall of the right atrium at the junction of SVC & right atrium
79
The AV node lies
In the lower part of the interatrial septum near the opening of the coronary sinus (Right Atrium)
80
AV Bundle descends
Decends from the AV node to the upper membranous part of interventricular septum
81

Cardiovascular (10 decks)

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