10.4 Circulation And Lymphatics

Question 1

Inner layer of blood vessel

Answer 1

Endothelium

Question 2

Tunica intima aka

Answer 2

Inner layer of blood vessel (endothelium)

Question 3

Tunica media aka

Answer 3

Middle layer (smooth muscle) with elastic lamina on either side

Question 4

Vasoconstriction /dilation occur

Answer 4

Tunica media (smooth muscle )
Effect arterioles most

Question 5

Tunica externa

Answer 5

Dense irregular connective tissue surrounding vessel (outer)

Question 6

Larger arteries are

Answer 6

Elastic (named are musclar)

Question 7

Arterioles are

Answer 7

Easily affected by ANS and local factors. 10-100 micrometers

Vasoconstriction

Question 8

Capillaries are

Answer 8

Business end of circulatory system
8-1 micrometer. Endothelium & areolar CT

Question 9

Veins are

Answer 9

Low pressure, check valves

Question 10

Capillary exchange

Answer 10

• As blood comes in under pressure, hydrostatic pressure forces fluid out through clefts/pores.
• colloid osmotic pressure (albumin coming back in cell with fluid)

Question 11

Colloid is

Answer 11

Suspension of protein in solution

Question 12

Lymphatic system

Answer 12

Drainage system takes remaining 20% of fluid & debris surrounding capillaries and brings it back to heart.

Question 13

Lymphatic filariae

Answer 13

Nematode infection of lymph nodes causes peripheral edema

Question 14

Venous return

Answer 14

Not under pressure
Skeletal muscle pump brings blood back.
Respiratory pump (negative pressure brings blood out)