blood vessels (5)

Question 1

what are the three types of blood vessels

Answer 1

arteries, capillaries and veins

Question 2

do arteries carry blood towards or away from the heart

Answer 2

away

Question 3

do arteries have a small or large lumen

Answer 3

small

Question 4

what are the walls of arteries like

Answer 4

thick, muscular and elastic

Question 5

why do arteries have such thick walls

Answer 5

to withstand pressure from the blood

Question 6

what type of blood do (most) arteries carry

Answer 6

bright red oxygenated blood

Question 7

what is the exception for arteries carrying bright red, oxygenated blood

Answer 7

pulmonary artery

Question 8

what do capillaries link

Answer 8

arteries and veins

Question 9

how narrow/wide are capillaries

Answer 9

they are very narrow, one red blood cell at a time can fit through

Question 10

do veins carry blood towards or away from the heart

Answer 10

towards

Question 11

what type of blood do most veins carry

Answer 11

dark red, deoxygenated blood

Question 12

do veins have a large or small lumen

Answer 12

large

Question 13

what adaptation do veins have to prevent back flow of blood

Answer 13

valves

Question 14

what type of walls do veins have and why

Answer 14

they are thin walled because the blood pressure is lower

Question 15

define blood pressure

Answer 15

the force of the blood passing through an artery

Question 16

how does blood pressure differ during exercise

Answer 16

it goes up during physical activity

Question 17

define vasoconstriction

Answer 17

when arteries leading to inactive muscles or organs constrict during exercise

Question 18

define vasodilation

Answer 18

when arteries leading to active muscles dialate during exercise