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Flashcards in Structure of the heart Deck (39):
1

What is the membrane/sac that surrounds the heart and attaches to the diaphragm and sternum

Pericardium

2

What is the region between the 2 pleural cavities (between lungs)

mediastinum

3

What is mesothelium

epithelial lining of body cavity

4

What is the outermost layer of the heart

Epicardium- outermost epithelial layer

5

What is the middle layer of the heart?

myocardium – middle muscular layer

6

What is the deepest layer of the heart?

endocardium – innermost epithelial lining of the inside of heart chambers and valves

7

What does cardiac muscle do

moves blood and maintains blood pressure

8

Describe cardiac muscles

Cardiac muscle cells are short, branched, and striated

9

What are intercalated disks

Intercalated disks are intercellular junctions that include gap junctions and function to synchronize cardiac muscle cell contraction

10

____________ is a groove marking the boundary between the atria and ventricles

Coronary sulcus

11

____________ is a depression marking the boundary between the right and left ventricles

anterior interventricular sulcus

12

____________ is a depression marking the boundary between the right and left ventricles

Posterior interventricular sulcus

13

Where do the left and right coronary arteries originate

Base of the aorta

14

What is the function of the left coronary artery

provides blood to the left atrium and ventricle and interventricular septum

15

What is the function of the right coronary artery

provides blood to the right
atrium, portions of both ventricles and the conducting system of the heart

16

What is the function of the circumflex artery

supplies the left atrium and posterior surface of left ventricle

17

What does the anterior interventricular artery do

sometimes called the left
anterior descending (LAD) artery; supplies the left ventricle and interventricular septum

18

The circumflex artery and anterior interventricular artery are both branches of what?

left coronary artery

19

What is the function of the great cardiac vein

drains blood from the region
supplied by the anterior interventricular artery

20

What is the function of the small cardiac vein

drains blood from the right atrium and ventricle

21

What is the function of anterior cardiac veins

they drain blood from the right ventricle directly into the right atrium

22

What is the circumflex artery

continuation of left coronary artery supplying left atrium

23

What is the marginal artery

supplies the posterior surface of the left atrium and ventricle

24

What is the right coronary artery and what is its function

provides blood to the right
atrium, portions of both ventricles and the conducting system of the heart

25

What is the posterior interventricular artery and what is its function

supplies blood to the posterior portion of the interventricular septum and adjacent portions of the right and left ventricles

26

What is the function of the great cardiac vein

drains blood from the region
supplied by the anterior interventricular artery; drains into coronary sinus

27

What is the function of the posterior cardiac vein

drains the area supplied by the circumflex artery; drains into coronary sinus

28

What is the function of the coronary sinus

receives venous blood from
veins of the heart and empties directly into the right atrium

29

What is the function of the small cardiac vein

drains blood from the right
atrium and ventricle; drains into coronary sinus

30

What is the function of the middle cardiac vein

drains area supplied by the
posterior interventricular artery; drains into coronary sinus

31

The right atrium receives deoxygenated blood from the superior and inferior vena cavae and the coronary sinus. It opens into the right ventricle through the _________

tricuspid atrioventricular valve

32

The right ventricle receives 1)________ blood from the 2)________ through the 3)_____________

1- deoxygenated blood
2- right atrium
3- tricuspid atrioventricular valve

33

The tricuspid valve has 1)________ or flaps to which are attached 2)_________, fibrous connective tissue strands that attach to 3)___________ on the wall of the ventricle

1- 3 cusps
2- chordae tendinae
3- papillary muscles

34

The right ventricle opens into the 1)_________ through the pulmonic valve

1- pulmonary trunk

35

The pulmonic and aortic valves are also called _________ valves

“semilunar”

36

The pulmonic and aortic valves each have ________ that open to allow blood to be ejected from the ventricles, but close to prevent backflow of blood into the ventricles

3 bowl shaped cusps

37

The left atrium receives oxygenated blood from the lungs through the 1)____________. It opens into the left ventricle through the 2)_____________

1- pulmonary veins
2- bicuspid (mitral) atrioventricular valve

38

The bicuspid valve has 1)______ or flaps to which are attached 2)________, fibrous connective tissue strands that attach to 3)________ on the wall of the ventricle

1- 2 cusps
2- chordae tendinae
3- papillary muscles

39

The left ventricle opens into the aorta through the

aortic valve