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BIO 205 pt 3 > Z HEART > Flashcards

Flashcards in Z HEART Deck (31):
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 ______

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

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 _______

sternum
ribs, intercostal muscles, lungs
thoracic vertebrae
pericardium

3

___________: lying adjacent to the sternum and costal cartilages

sternocostal surface

4

_________: adjacent to the diaphragm

diaphragmatic surface

5

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

pulmonary surface

6

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

apex

7

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

base
superior vena cava, pulmonary trunk, aorta

8

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

auricles, ear

9

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

crista terminalis

10

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

musculi pectinati
right, auricles

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

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

12

________: the partition between the right and left atrium
in this septum lies the oval depression called ______

interatrial septum
fossa ovalis

13

closes at birth and becomes the fossa ovalis

foramen ovale

14

the right atrioventricular opening is guarded by the _______ or ________

tricuspid valve, right atrioventricular valve

15

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

valve

16

an atrioventricular valve is composed of 3 parts:

cusps, chordae tendinae, papillary muscle

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

tricuspid valve
backflow, right, right

18

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

trabeculae carnae
papillary muscle

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

moderator band, septomarginal trabecula
conduction

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 ____________

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

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 ______

semilunar valve
cusps
nodule

22

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

left auricle

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 _____________

pulmonary, left atrioventricular opening

24

the left atrioventricular opening is guarded by the _______
it contains ____ cusps

bicuspid valves
2

25

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

trabeculae carnae

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 _____

thickness
left, right

27

the only openings of the left ventricle are

left atrioventricular opening
opening of the aortic semilunar valves

28

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

coronary

29

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

right
right marginal branch
posterior interventricular branch

30

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

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

31

the muscle of the heart is drained by the ____ veins

cardiac