chapter 2

Question 1

layers of the heart

Answer 1

epicardium, endocardium, myocardium

Question 2

epicardium

Answer 2

outer membrane layer of hear

Question 3

myocardium

Answer 3

muscular wall of the heart, bw epi and endo

Question 4

endocardium

Answer 4

membrane lining the inside surface of heart

Question 5

heart chambers

Answer 5

r and l atrium, r and l ventricles

Question 6

cardiac cycle

Answer 6

diastole (contraction of atria “dub”), systole (contraction of ventricles “lub”)

Question 7

diastole

Answer 7

ventricles relax and atria contract (sa node), semilunar valves close (dub) atrioventricular valve opens

Question 8

systole

Answer 8

ventricles contract (av node) semilunar valves open, av valve closes (lub)

Question 9

p wave

Answer 9

reps atrial depolarization

Question 10

qrs complex

Answer 10

reps ventricular depolarization

Question 11

t wave

Answer 11

reps ventricular repolarization

Question 12

arteries

Answer 12

carry blood away from heart to body

Question 13

veins

Answer 13

carry blood from body back to heart (have valves)

Question 14

capillaries

Answer 14

one-cell-thick bw arteries and veins that distribute oxygen rich blood to body

Question 15

tunica intima

Answer 15

composed of a simple squamous epithilium called endothelium, rest on connective tissue membrane rich in elastic and collagenous fibers

Question 16

tunica media

Answer 16

makes up bulk of arterial wall

Question 17

major veins

Answer 17

superior and inferior vena cava