blood vessels pt.1

Question 1

efferent vessels

Answer 1

arteries

Question 2

carry blood aways from the heart. Blood is oxygenated except in pulmonary circulation and umbilical vessels of fetus

Answer 2

arteries

Question 3

afferent vessels

Answer 3

veins

Question 4

Vessels carrying blood back to heart. Blood is deoxygenated except for pulmonary circulation and umbilical vessels of fetus

Answer 4

veins

Question 5

Connects smallest arteries to smallest veins, creating a circuit. In direct contact with tissue cells

Answer 5

capillaries

Question 6

Usually round with thick wall. carries blood away from the heart. efferent vessels

Answer 6

arteries

Question 7

Usually flattened with a thin wall. Carries blood toward the heart. Has more smooth muscle. afferent vessels

Answer 7

Veins

Question 8

tunic layers of veins and arteries (3)

Answer 8

tunica intima, tunica media, tunica externa

Question 9

space all vessels provide for blood to pass through. surrounded by endothelium/tunica intima

Answer 9

lumen

Question 10

capillary only have an _______ layer surrounded by sparse amounts of ____ _____.

Answer 10

endothelium, basal lamina

Question 11

Innermost layer containing endothelial cells. Has connective tissues with elastic fibers.

Answer 11

Tunica intima aka tunica interna

Question 12

In _____, the tunica intima has an outer marginal layer of ____ ____ (internal elastic membrane).

Answer 12

arteries, elastic fibers

Question 13

Middle layer containing concentric sheets of smooth muscle.

Answer 13

tunica media

Question 14

Contraction of smooth muscle in tunica media causes _________, a decrease in vessel diameter. Relaxation of smooth muscles cause _________, an increase in vessel diameter.

Answer 14

vasoconstriction, vasodilation

Question 15

Separates tunica media from tunica externa

Answer 15

external elastic membrane

Question 16

Connective tissue sheath forming outer most tunic layer in typical blood vessel. Anchors vessel to surrounding tissues.

Answer 16

Tunica externa/tunica adventitia

Question 17

Layer contains collagen and scattered elastic fibers in artery. Generally thicker in veins than tunica media.

Answer 17

tunica externa aka tunica adventitia

Question 18

Arteries, arterioles, capillaries, venules, veins

Answer 18

general blood vessel classes (5)

Question 19

Large vessels close to the heart that stretch and recoil when heart beats. Includes pulmonary trunk, aorta, and branches.

Answer 19

elastic arteries

Question 20

Medium-sized arteries which distribute blood to skeletal muscles and internal organs.

Answer 20

muscular arteries

Question 21

Poorly defined tunica externa. Tunica media is only 1–2 smooth muscle cells thick

Answer 21

arterioles

Question 22

Only blood vessels to allow exchange between blood and interstitial fluid. Very thin walls allow easy diffusion.

Answer 22

capillaries

Question 23

Small veins. Lack a tunica media and resemble expanded capillaries. Collect blood from capillaries

Answer 23

venules

Question 24

Thin tunica media with smooth muscle cells and collagen fibers. Thickest layer is tunica externa with longitudinal collagen and elastic fibers

Answer 24

medium-sized veins

Question 25

Includes superior venae cava, inferior venae cava and tributaries. Contain all three vessel wall layers. Thin tunica media surrounded by thick tunica externa.

Answer 25

large veins

Question 26

In between artery tunica layers. Absent or minimal in vein. Allows expansion/contraction

Answer 26

external elastic membranes