unit 3; blood vessels and their functions

Question 1

function of arteries

Answer 1

carries blood away from the heart and into arterioles

Question 2

function of arterioles

Answer 2

control blood flow from arteries to capillaries

Question 3

function of capillaries

Answer 3

link arterioles to veins

Question 4

function of veins

Answer 4

carry blood from capillaries to heart6

Question 5

what is the outside layer of the blood vessels

Answer 5

tough fibrous outer layer

Question 6

what is the second layer of the blood vessels

Answer 6

muscle layer

Question 7

what is the 3rd layer of the blood vessels

Answer 7

elastic layer

Question 8

what is the 4th layer of the blood vessels

Answer 8

thin inner lining (endothelium)

Question 9

what is the last layer of the blood vessels

Answer 9

lumen- central cavity (not a layer)

Question 10

what is tissue fluid

Answer 10

watery liquid, contains glucose, amino acids, fatty acids, ions and oxygen

Question 11

function of tissue fluid

Answer 11

provides tissues with said substances, takes away waste products such as carbon dioxide

Question 12

how does tissue fluid return to the circulatory system

Answer 12

low hydrostatic pressure in the capillaries forces it in, and water leaves the tissue by osmosis

Question 13

how are the contents of the lymphatic system moved

Answer 13

hydrostatic pressure of tissue fluid outside the capillaries, contraction of body muscles- valves ensure correct direction of flow