parts of the heart

Question 1

outer layer

Answer 1

Epicardium

Question 2

cardiac muscle

Answer 2

Myocardium

Question 3

Responsible for the pumping action of the heart

Answer 3

Myocardium

Question 4

makes up approximately 95% of the heart wall.

Answer 4

Myocardium

Question 5

thin layer of endothelium

Answer 5

Endocardium

Question 6

provides a smooth lining for the chambers of the heart and covers the valves of the heart.

Answer 6

Endocardium

Question 7

receive blood from blood vessels returning blood to the heart

Answer 7

veins

Question 8

eject the blood from the heart into blood
vessels

Answer 8

arteries

Question 9

Forms the right border of the heart and receives blood from three veins: the superior vena cava, inferior vena cava, and coronary sinus

Answer 9

Right Atrium

Question 10

thin partition between the right left atrium

Answer 10

interatrial septum

Question 11

prominent feature of this septum is an oval depression

Answer 11

fossa ovalis

Question 12

an opening in the interatrial septum of the fetal heart that normally closes soon after birth

Answer 12

foramen ovale

Question 13

blood passes from the right atrium into the right ventricle

Answer 13

tricuspid valve

Question 14

forms most of the anterior surface of the heart

Answer 14

Right Ventricle

Question 15

inside of the right ventricle contains a series of ridges formed by raised bundles of cardiac muscle fibers

Answer 15

trabeculae

Question 16

separate right ventricle from the left ventricle

Answer 16

interventricular septum

Question 17

blood passes from the right ventricle through the pulmonary valve into a large artery called the

Answer 17

pulmonary trunk

Question 18

receives blood from the lungs through four pulmonary veins.

Answer 18

Left Atrium

Question 19

Blood passes from the left atrium into the left ventricle through the

Answer 19

bicuspid (mitral) valve

Question 20

It is also called the left atrioventricular valve.

Answer 20

Left Atrium

Question 21

the thickest chamber of the heart, averaging 10–15 mm

Answer 21

Left Ventricle

Question 22

blood passes from the left ventricle through the _____________ into the ascending aorta

Answer 22

aortic valve