The Heart

Question 1

function

Answer 1

to transport substances from place to place in the body

Question 2

3 layers of the heart

Answer 2

epicardium- thin connective tissue (outer)
myocardium- cardiac muscle (middle)
endocardium- thin inside layer (inner)

Question 3

valves of the heart

Answer 3

tricuspid, pulmonary, mitral (bicuspid), and aortic semilunar

Question 4

Pulmonary Circulation

Answer 4

Right side, to the lungs

Question 5

Systemic Circulation

Answer 5

Left side, to the body

Question 6

pathway of blood to the lungs

Answer 6

right atrium to the tricuspid valve to the right ventricle to the pulmonary semilunar valve to the pulmonary trunk to the left and right pulmonary artery to the lungs

Question 7

Coronary artery

Answer 7

supplies blood to the heart muscle

Question 8

Coronary vein

Answer 8

takes deoxygenated blood that has been used by cardiac muscles and returns it back to the right atrium

Question 9

function of intercalated disks

Answer 9

to enable the heartbeat

Question 10

where does the heartbeat originate

Answer 10

1. SA nodes set the rate and rythm

2. AV nodes carry electrical signals from the heart upper chamber to the lower ones