Blood Vessels

Question 1

What are parts of the arteries?

Answer 1

elastic tissue
thick layer of muscle
folded endothelium
narrower lumen

Question 2

What is arteries in blood vessels?

Answer 2

arteries flow away from the heart

narrower lumen than vein

blood is at higher pressure
elasti tissue and folded endothelium - allows heart to stretch and when ventricles relax they recoil which maintains a smooth pressuure

thick muscle - can contract and change the flow of blood (vascodilation)

Question 3

What are parts of the veins?

Answer 3

thin muscle (outer layer)
wide lumen (middle part)

Question 4

What is veins in blood vessels?

Answer 4

veins flow towards the heart
wide lumen
thin layer of muscle (cant contract)
smooth endothelium - reduces friction
one way valve  - prevents backflow of blood
low pressure

Question 5

What is capillaries in blood vessels?

Answer 5

surround all cells and exchange stuff e.g. O2 / glucose

endothelium is thin - short diffusion distance
high surface area - fast rate of diffusion