GCSE Biology - Blood Vessels

name the three types of blood vessels

arteries

capillaries

veins

do arteries carry blood at a high or low pressure?

high

give three features of arteries

- thick wall

- thick layer of muscle and elastic fibres

- small lumen

what is the name of the hollow down the centre of blood vessels?

lumen

describe two features of capillaries

- walls are one cell thick

- small lumen

is blood flow in veins high or low?

low

describe three features of veins

- thin walls

- valves

- large lumen

do veins have a small or large lumen?

large

describe the equation for the rate of blood flow

volume of blood / time

function of arteries

carry blood away from your heart at high pressure

function of capillaries

link arteries and veins and deliver/remove substances to cells

function of veins

carry blood away from organs towards your heart

how to arteries transport blood?

the artery stretches as blood is forced through and go back into shape afterwards forming a pulse

what does a double circulatory system mean?

one transport system carries blood from heart to lungs and back again. the other carries blood from heat to all other organs and back again

why is a double circulatory system vital in warm blooded mammals?

makes the circulatory system very efficient