Chambers of the Heart

Question 1

The heart is divided by

Answer 1

vertical septa

Question 2

The heart is divided into

Answer 2

four chambers ( the right and left atria and the right and left ventricles)

Question 3

right and left atria شو مالهم

Answer 3

The right atrium lies anterior to the left atrium

Question 4

right and left ventricles شو مالهم

Answer 4

The right ventricle lies anterior to the left ventricle

Question 5

The cavity of right atrium is divided

into

Answer 5

2 continuous spaces.

Question 6

The separation between these 2

spaces marked

Answer 6

Externally

Internally

Question 7

The separation between these 2

spaces marked Externally by

Answer 7

a vertical groove (sulcus terminalis) extending from the right side of SVC to
the right side of IVC.

Question 8

The separation between these 2

spaces marked Internally

Answer 8

this division is indicated by a smooth muscular ridge (crista terminalis).

Question 9

spaces of cavity of Right Atrium

Answer 9

Space posterior to crista terminalis

Space anterior to crista terminalis

Question 10

Space anterior to crista terminalis

Answer 10

(Atrium proper)

Question 11

Space posterior to crista terminalis name

Answer 11

(sinus of venae cavae)

Question 12

Space anterior to crista terminalis includes

Answer 12

Right auricle.

Question 13

Space anterior to crista terminalis

(Atrium proper) characteristic

Answer 13

Rough and covered by bundles of muscle

fibres (musculi pectinati).

Question 14

ØThe blood leaves right atrium to

right ventricle via

Answer 14

tricuspid valve.

Question 15

Space posterior to crista terminalis

(sinus of venae cavae) characteristic

Answer 15

Has smooth, thin walls.

Question 16

the right atrium separated from left atrium by

Answer 16

The interatrial septum

Question 17

The interatrial septum has an oval depression called

Answer 17

Fossa ovalis

Question 18

The margin of oval depression is called

Answer 18

Anulus ovalis (limbus of fossa ovalis)

Question 19

The fossa ovalis marks the location

of the embryonic

Answer 19

foramen ovale

Question 20

foramen ovale is an important part of

Answer 20

fetal circulation
→ allows oxygenated blood (coming to right atrium through IVC) to pass directly to the left atrium and so bypass the lungs, which are nonfunctional before birth

Question 21

Openings in right atrium

Answer 21

SVC
IVC
Coronary sinus
Right atrioventricular orifice
Openings for small veins.

Question 22

SVC Opening

Answer 22

It returns the blood to the heart from the upper half of the body.

Question 23

IVC Opening

Answer 23

it is guarded by a rudimentary, nonfunctioning valve.

Question 24

Coronary sinus Opening

Answer 24

has a well-defined valve

Question 25

Right atrioventricular orifice Opening lies anterior to

Answer 25

IVC opening

Question 26

Right atrioventricular orifice is surrounded | by

Answer 26

a fibrous ring which gives attachment to the tricuspid valve.

Question 27

The right ventricle communicates with the right atrium through the

Answer 27

atrioventricular orifice.

Question 28

The right ventricle communicates with the pulmonary trunk through the

Answer 28

pulmonary orifice

Question 29

infundibulum (conus arteriosus).

Answer 29

As the cavity approaches the pulmonary orifice it becomes funnel shaped,

Question 30

wall of right ventricle is

Answer 30

thinner than that of left ventricle

Question 31

walls of right ventricle contain

Answer 31

muscular irregular projections called trabeculae carneae

Question 32

type of papillary muscles

Answer 32

1. Anterior papillary muscle 2. Posterior papillary muscle 3. Septal papillary muscle

Question 33

Trabeculae carneae with one end attached to

Answer 33

ventricular surface

Question 34

papillary muscles

Answer 34

Trabeculae carneae with one end attached to ventricular surface

Question 35

Each papillary muscle is attached to

Answer 35

the cusps of tricuspid valve by tendinous threads called chordae tendineae.

Question 36

chordae tendineae.

Answer 36

Each papillary muscle is attached | to the cusps of tricuspid valve by tendinous threads

Question 37

Cavity of right ventricle

Answer 37

سلايد 23

Question 38

Left atrium of the heart forms

Answer 38

the greater part of base of heart.

Question 39

Left atrium of the heart wall is

Answer 39

smooth except for small musculi pectinati in the left auricle

Question 40

Left atrium of the heart Receives

Answer 40

4 pulmonary veins which have no valves.

Question 41

Left atrium of the heart Sends blood to

Answer 41

left ventricle through the left atrioventricular orifice which is guarded by mitral valve

Question 42

The interatrial septum separates

Answer 42

Rt & Lt atria

Question 43

depression in interatrial septum

Answer 43

valve of foramen ovale

Question 44

Left ventricle of the heart wall is

Answer 44

thicker than that of right ventricle.

Question 45

Left ventricle of the heart wall contains

Answer 45

1. trabeculae carneae. | 2. 2 large papillary muscles (anterior & posterior)

Question 46

Left ventricle of the heart receives blood from

Answer 46

left atrium through left atrio-ventricular | orifice which is guarded by mitral valve.

Question 47

ØThe blood leaves Left ventricle of the heart

Answer 47

to the ascending aorta through the aortic | orifice

Question 48

interventricular septum separates

Answer 48

the right & left ventricles.

Question 49

interventricular septum

Answer 49

■ a muscular part. | ■ a membranous part.

Question 50

2 large papillary muscles (anterior & posterior) are attached by

Answer 50

chordae tendineae to cusps of mitral valve