The Circulatory System - The Blood Vessels Flashcards
1
Q
Name 3 main Blood vessels in the body
A
Arteries
Veins
Capillaries
2
Q
Artery Function:
A
Carry Blood AWAY from the heart
3
Q
Artery structure:
A
Blood is pumped out of the heart at a high pressure so there walls are strong and elastic for the heart to contract.
4
Q
Vein Function:
A
Carries Blood TOWARDS the heart
5
Q
Vein Structure:
A
They have Large lumen (hollow space in the vein)to help the blood flow despite the low pressure.
They have valves to prevent backflow of the blood
6
Q
Capillaries Function:
A
Help to exchange substances in the blood and takes blood to the body cells
7
Q
Capillaries Structure:
A
The walls of the capillaries are one cell thick and permeable so that the rate of diffusion decreases
