cardiovascular

Question 1

mediastinum

Answer 1

a membrane between two body cavities or organs especially the lungs

Question 2

apex

Answer 2

top rounded structure

Question 3

base

Answer 3

lowest part, bottom edge

Question 4

pericardium

Answer 4

membrane that encloses the heart

Question 5

atria

Answer 5

the upper cavities of the heart

Question 6

ventricles

Answer 6

a hollow part in a cavity or organ

Question 7

interatrial septum

Answer 7

wall of tissue that seperates the atris

Question 8

superior venae cavae

Answer 8

large vein carries deoxyginated blood into the heart upper body

Question 9

inferior vena cava

Answer 9

lower body

Question 10

pulmonary arteries

Answer 10

carries blood from the right of the heart to the kungs for oxygen

Question 11

pulmonary veins

Answer 11

carries blood from the lungs to the left side of the heart with oxygen

Question 12

aorta

Answer 12

main artory of the body supplies circulatory system with oxygenated blood

Question 13

atrioventricular valves

Answer 13

four structures in the heart that prevent backflow

Question 14

bicuspid valves(mitral valve)

Answer 14

the valve between the left atrium and the left ventricle of the heart, consisting of two tapered cusps

Question 15

tricuspid valves

Answer 15

a valve that is situated at the opening of the right atrium of the heart into the right ventricle and that resembles the mitral valve in structure but consists of three triangular membranous flaps—called also right atrioventricular valve.

Question 16

chordae tendineae

Answer 16

heart strings, are cord-like tendons that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart.

Question 17

semilunar valves

Answer 17

each of a pair of valves in the heart, at the bases of the aorta and the pulmonary artery, consisting of three cusps or flaps that prevent the flow of blood back into the heart.

Question 18

coronary arteries

Answer 18

an artery supplying blood to the heart

Question 19

cardiac veins

Answer 19

ny of the veins returning the blood from the tissues of the heart that open into the right atrium either directly or through the coronary sinus

Question 20

coronary sinus

Answer 20

a wide venous channel about 2.25 centimeters in length that receives blood from the coronary veins and empties into the right atrium of the heart.

Question 21

`sintoatrial node

Answer 21

a small body of specialized muscle tissue in the wall of the right atrium of the heart that acts as a pacemaker by producing a contractile signal at regular intervals.

Question 22

purkinje fibers

Answer 22

Further histologic examination reveals that these fibers are split in atria and ventricles walls. The electrical origin of atrial Purkinje fibers arrives from the sinoatrial

Question 23

pacemaker

Answer 23

n artificial device for stimulating the heart muscle and regulating its contractions.

Question 24

systole

Answer 24

he phase of the heartbeat when the heart muscle contracts and pumps blood from the chambers into the arteries.

Question 25

diastole

Answer 25

e phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.