Cardiovascular System

Question 1

Apex

Answer 1

the pointed end at the bottom of the heart.

Question 2

Base

Answer 2

any substance that binds to or accepts hydrogen ions.

Question 3

Pericardium

Answer 3

the membrane that surrounds and protects the heart.

Question 4

Atria

Answer 4

a blood collection chamber of the heart.

Question 5

Ventricles

Answer 5

spaces within the brain through which cerebrospinal fluid (CSF) flows.

Question 6

Interatrial septum

Answer 6

the separation of right and left atria.

Question 7

Superior venae cavae

Answer 7

one of the two main veins bringing de-oxygenated blood from the body to the heart.

Question 8

Inferior venae cavae

Answer 8

one of the two great abdominal vessels.

Question 9

Pulmonary arteries

Answer 9

the only artery that carries deoxygenated blood away from the heart, to take it to the lungs.

Question 10

Pulmonary veins

Answer 10

responsible for carrying oxygenated blood from the lungs back to the left atrium of the heart.

Question 11

Aorta

Answer 11

the largest artery in the body

Question 12

Atrioventricular valves

Answer 12

The valves in the heart that separte the atria from teh ventricles.

Question 13

Bicuspid valves

Answer 13

the valve between the left atrium and left ventricle

Question 14

Tricuspid valves

Answer 14

a structure between the right atrium and right ventricle that opens and closes to permit the flow of a fluid in only one direction.

Question 15

Chordae tendineae

Answer 15

tough fibrous bands of connective tissue that attach the cuspid valves to the walls of the ventricles of the heart.

Question 16

Semilunar valves

Answer 16

separating the aorta from the left ventricle that prevents blood from flowing back into the left ventricle

Question 17

Coronary arteries

Answer 17

supply blood to the heart muscle, and are branches of the aortic root.

Question 18

Cardiac veins

Answer 18

returns deoxygenated blood (containing metabolic waste products) from the myocardium to the right atrium.

Question 19

Coronary sinus

Answer 19

to collect deoxygenated blood from the myocardium of the heart.

Question 20

Sinoatrial node

Answer 20

a section of nodal tissue that is located in the upper wall of the right atrium.

Question 21

Purkinje fibers

Answer 21

specialized fibers that are not muscle fibers and are not involved in contraction, but are specialized for conduction of impulses.

Question 22

Pacemaker

Answer 22

an implanted electronic device that takes over the function of the natural cardiac pacemaker.

Question 23

Systole

Answer 23

contraction of the muscle.

Question 24

Diastole

Answer 24

relaxation of the muscle.