Question

veins have walls which allow blood
to flow only in one direction Arteries
do not have walls yet, the blood
allow it to flow in ane direction. can you
explain why​

Answer 1

Answer:

blood in arteries is under preasure.

hence it dosent require valves.

but in veins blood is under no preasure

hence there may be a chance of back flow of blood

therefore there is valves in veins

Answer 2

Answer:

Mate it's not walls it's valves

Blood flow in veins is in low pressure so there are chances of blood to come back thats why it has valves so that it won't come back.

In the blood flow is in high pressure so there is no need of valves .

Hope it helps