blood vessels

Question 1

what do blood vessels do

Answer 1

blood is carried by blood vessels to and from all cells in the body

Question 2

what are the 3 main type of blood vessels

Answer 2

arteries, veins, capillaries

Question 3

arteries

Answer 3

carry blood away from the heart under pressure

they push the blood around the body

the walls are thicker and more muscular

the hallow centre is narrower than equivalent vein

Question 4

veins

Answer 4

veins carry blood back into the heart

veins have thinner walls and a wider central channel than arteries

they carry blood under low pressure

veins contain valves to prevent backflow of blood

Question 5

capillaries

Answer 5

capillaries are thin walled (only one cell thick)

they have a large surface area forming networks at tissues and organs to allow efficient exchange of materials between the blood and tissue cell

Question 6

capillaries, veins and arteries order

Answer 6

from heart –> arteries –> body capillaries –> veins –> to heart