Blood

Question 1

What are the three types of blood vessels

Answer 1

arteries
veins
capillaries

Question 2

What do arteries do

Answer 2

carry blood away from the heart

Question 3

What adaptations do arteries have and how does it help

Answer 3

thick muscular layer - adds strength to resist high pressure

thick elastic layer - allows arteries to stretch and recoil to resist the high pressure

Question 4

What do veins do

Answer 4

carry blood towards the heart

Question 5

What adaptations do veins have and how does it help

Answer 5

wide lumen enables low pressure

valves - stops backflow of blood

Question 6

what do capillaries do

Answer 6

enable the transfer of substances between the blood and tissues

Question 7

what adaptations do capillaries have and how does it help?

Answer 7

walls are one cell thick so short diffusion path
permeable walls so substances can diffuse across
narrow lumen blood moves slowly so more time for diffusion

Question 8

Equation for the rate of blood flow

Answer 8

volume of blood divided by number of minutes