Anatomy of the Heart

Question 1

The heart wall is comprised of what three layers

Answer 1

epicardium
myocardium
endocardium

Question 2

endocardium tissue type

Answer 2

simple squamous endothelium

aveolar tissue

Question 3

myocardium tissue type

Answer 3

cardiac muscle cells
connective tissue
concentric layers
two divisions of ventricular myocardium

Question 4

epicardium tissue type

Answer 4

serous membrane
covers the heart (aka visceral pericardium)
mesothelium
areolar tissue

Question 5

gap junctions in the heart

Answer 5

need for even distribution of Ca++ for uniform contraction

Question 6

desmosomes in the heart

Answer 6

provide strength, allows cardiac muscle to contract and relax together

Question 7

viscercal pericardium is also known as

Answer 7

epicardium

Question 8

parietal pericardium

Answer 8

dense fibrous layer
areolar tissue
mesothelium

Question 9

cardiac muscle tissue

Answer 9

intercalated discs (interconnect muscle cells)
striated
single nucleus

Question 10

intercalated discs

Answer 10

interconnect cardiac muscle cells
secured by desmosomes
linked by gap junctions
convey force of contraction 
propagate muscle potentials

Question 11

cardiac muscle cells

Answer 11

small size
single, central nucleus
branching interconnections between cells
intercalated discs

Question 12

blood vessels include

Answer 12

arteries, veins, capillaries

Question 13

all veins travel

Answer 13

return blood to the heart (with the exception of the portal vein)

Question 14

all arteries travel

Answer 14

move blood away from the heart

Question 15

smallest branches of arteries

Answer 15

arterioles

Question 16

smallest blood vessels

Answer 16

capillaries

Question 17

collect blood from capillaries

Answer 17

venules

Question 18

tunica intima (tissue type)

Answer 18

inner layer
simple squamous endothelial lining
areolar CT layer
internal elastic membrane (arteries only) - binds to media

Question 19

tunica media (tissue type)

Answer 19

middle layer
concentric sheets of sheets of smooth muscle, involuntary binds to inner (intima) and outer (externa) layers
external elastic membrane (arteries only) - binds to externa

Question 20

tunica externa (tissue type)

Answer 20

dense, irregular CT or fibrous CT
arteries - contains collagen and elastic fibers
veins - contains elastic fibers, smooth muscle cells (lack internal/external elastic fibers)

Question 21

vessels of vessels

Answer 21

vasa vasorum

Question 22

small arteries and veins in the walls of larger arteries and veins

Answer 22

vasa vasorum

Question 23

supplies nutrients to the tunica media and tunica externa

Answer 23

vasa vasorum

Question 24

tunica media larger than tunica externa in what type of vessel

Answer 24

artery

Question 25

tunica externa larger than tunica media in what type of vessel

Answer 25

vein

Question 26

internal and external elastic membranes are absent in what vessel

Answer 26

veins