circulatory system

Question 1

epicardium

Answer 1

outside surface

Question 2

endocardium

Answer 2

inside surface

Question 3

myocardium

Answer 3

muslce of the heart

Question 4

pericardium

Answer 4

the sac that encloses the heart

Question 5

right atrium

Answer 5

where the deoxygenated blood from the tissues of the body enters

Question 6

right ventricle

Answer 6

pumps the blood through pulmonary valve into the pulmonary circuit

Question 7

left atrium

Answer 7

where the blood returns from the pulmonary circuit

Question 8

left ventricle

Answer 8

pumps blood through the aortic valve into the systemic circuit.

Question 9

atrioventricular valves

Answer 9

prevent backflow of blood into the atria when the ventricles contract

Question 10

what is unique of the left atrioventricular valve?

Answer 10

it is a bicupsid (dual flap) valve.

Question 11

what is unique of the right atrioventricular valve?

Answer 11

it is a tricupsid valve composed of three leaflets and three papillary muscles

Question 12

systole

Answer 12

when the ventricles contract

Question 13

diastole

Answer 13

when the ventricles relax

Question 14

aortic valve

Answer 14

prevents backflow of blood into the ventricles when they relax. between the left ventricle and aorta

Question 15

pulmonary valve

Answer 15

also prevents backflow of blood into the ventricles when they relax. between the right ventricle and pulmonary artery

Question 16

what are aortic and pulmonary valves also known as?

Answer 16

semilunar valves

Question 17

aorta

Answer 17

the main trunk of the arteries leading to the systemic circulation

Question 18

pulmonary trunk

Answer 18

branches into two pulmonary arteries (left and right), which deliver de-oxygenated blood to the corresponding lung.