Z HEART

Question 1

a muscle that functions in pumping blood through vessels of the cardiovascular system
composed of _________ muscle, ______ in type
has 4 internal cavities called ______, 2 _____ and 2 _______
positioned in a way that the _____ lie _____ (not superior) to the _______; thus, blood, when passing from _____ to ventricles, moves ________ rather than ______
located in the _______ between the lungs, resting on the ______

Answer 1

heart
striatic muscle, cardiac
chambers, atria, ventricles
atria, posterior, ventricles
horizontally, vertically
thorax, diaphragm

Question 2

there are a number of structures that protect the heart:
anteriorly: _______
laterally: _________
posteriorly: ________
the heart is enclosed in a tough connective tissue sac called the _______

Answer 2

sternum
ribs, intercostal muscles, lungs
thoracic vertebrae
pericardium

Question 3

___________: lying adjacent to the sternum and costal cartilages

Answer 3

sternocostal surface

Question 4

_________: adjacent to the diaphragm

Answer 4

diaphragmatic surface

Question 5

__________: adjacent to the medial surface of the left & right lung

Answer 5

pulmonary surface

Question 6

______: a rounded projection of the heart that points inferiorly and to the left

Answer 6

apex

Question 7

_______: generally the area where the great vessels attach to the heart. these vessels are the ______. ______, and _______

Answer 7

base

superior vena cava, pulmonary trunk, aorta

Question 8

_________: both the right and left atria have ___-like appendages attached to the lateral surface of the atria

Answer 8

auricles, ear

Question 9

a vertical muscular ridge that is seen on the posterior wall of the right atrium

Answer 9

crista terminalis

Question 10

from the crista terminalis are muscular ridge like extensions called ________
found only in the _____ atrium and the right and left _____

Answer 10

musculi pectinati

right, auricles

Question 11

three major venuous openings in the right atrium:
________:opening of the superior vena cava, the main vein returning blood from the upper half of the body
__________: the opening of the inferior vena cava, the main vein returning blood from the lower half of the body
_________: receives the cardiac veins that drain the heart itself

Answer 11

superior vena caval opening
inferior vena caval opening
opening of the coronary sinus

Question 12

________: the partition between the right and left atrium

in this septum lies the oval depression called ______

Answer 12

interatrial septum

fossa ovalis

Question 13

closes at birth and becomes the fossa ovalis

Answer 13

foramen ovale

Question 14

the right atrioventricular opening is guarded by the _______ or ________

Answer 14

tricuspid valve, right atrioventricular valve

Question 15

a mechanical device that will allow flow of blood in one direction only, preventing retrograde flow (flow in the wrong direction)

Answer 15

valve

Question 16

an atrioventricular valve is composed of 3 parts:

Answer 16

cusps, chordae tendinae, papillary muscle

Question 17

the _______ functions in closing during contraction of the right ventricle
when closed, it will prevent ______ of the blood from the _____ ventricle to the _____ atrium

Answer 17

tricuspid valve

backflow, right, right

Question 18

the internal surface of the right ventricle consists of irregular ridge like projects of muscle called _______
______ are a type of ^

Answer 18

trabeculae carnae

papillary muscle

Question 19

a band of muscle in the chamber of the right ventricle is called the ________ or _______
it contains important fibers of the ______ system of the heart

Answer 19

moderator band, septomarginal trabecula

conduction

Question 20

the only openings of the right ventricle are the
__________: guarded by the tricuspid valve
___________
blood will leave the right ventricle and enter the _______ trunk by passing through the ___________
this opening is guarded by the ____________

Answer 20

right atrioventricular opening
pulmonary trunk opening
pulmonary, pulmonary trunk opening
pulmonary semilunar valve

Question 21

a _______ does not possess papillary muscles and chordae tendinae
it exists merely as pocket like flaps surrounding an opening
for each ________ there are 3 flaps or _____
the free edge of each cusp has a small central thickening of fibrous tissue, the ______

Answer 21

semilunar valve
cusps
nodule

Question 22

he left atrium has its musculi pectinati located within the _______ only

Answer 22

left auricle

Question 23

the main part of the left atrium is taken up by the 4 separate openings of the ___________ veins
the only other opening of the left atrium is the _____________

Answer 23

pulmonary, left atrioventricular opening

Question 24

the left atrioventricular opening is guarded by the _______

it contains ____ cusps

Answer 24

bicuspid valves

2

Question 25

the left ventricle also contains internal muscular ridge like folds called ________

Answer 25

trabeculae carnae

Question 26

one major difference between the right ventricle and left ventricle is the ________ of the wall itself the wall of the ____ ventricle is twice as thick as the _____

Answer 26

thickness | left, right

Question 27

the only openings of the left ventricle are

Answer 27

left atrioventricular opening | opening of the aortic semilunar valves

Question 28

_______ arteries arise from the ascending aorta and supply the muscle of the heart itself

Answer 28

coronary

Question 29

the ______ coronary artery courses on the right side of the heart and gives off:

Answer 29

right right marginal branch posterior interventricular branch

Question 30

the ______ coronary artery courses a short distance and gives off two branches

Answer 30

left left anterior descending artery (anterior inter ventricular branch) circumflux branch

Question 31

the muscle of the heart is drained by the ____ veins

Answer 31

cardiac