Blood Vessels & Circulation

Question 1

Capillaries

Answer 1

Smallest blood vessels with thin walls, location of exchange between blood and interstitial fluid

Question 2

Venules

Answer 2

Smallest branches of veins that collect blood from capillaries

Question 3

Veins

Answer 3

Returns blood to heart

Question 4

Tunica intima

Answer 4

Inner layer of vessel wall.
The endothelial lining
connective tissue layer
Internal elastic membrane (in arteries)
Elastic fibers in outer margin of tunica intima

Question 5

Tunica media

Answer 5

Middle layer of vessel wall.
Contains concentric sheets of smooth muscle in loose connective tissue
Encircles the endothelium that lines the lumen (interior space) of the blood vessel
Binds to inner and outer layers
External elastic membrane
Separates tunica media from tunica externa

Question 6

Tunica externa

Answer 6

Outer layer of the vessel wall.
Anchors vessel to adjacent tissues
Contains, Collagen fibers. Elastic fibers, Smooth muscle cells (in veins)

Question 7

Vasa vasorum

Answer 7

Small arteries and veins in walls of large arteries and veins
Serve cells of tunica media and tunica externa

Question 8

Differences between arteries and veins?

Answer 8

Arteries have thicker walls and higher blood pressure than veins
A constricted artery has a small, round lumen
A vein has a large, irregular lumen
The endothelium of a constricted artery is folded
Arteries are more elastic than veins
Veins have valves

Question 9

Map

Answer 9

(systolic pressure - diastolic pressure = x) x dived by 3 = that number + diastolic pressure

Question 10

F = P/R mean? (Note: F = flow; P = pressure; R = resistance)

Answer 10

Increasing P and decreasing R will increase F.