Question

why viens have valves?? ​

Answer 1

Answer:

$\huge{\fcolorbox{pink}{azure}{❥Aɴsᴡᴇʀ}}$

Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.) Valves also help blood travel back to the heart against the force of gravity.

Answer 2

Answer:

Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.) Valves also help blood travel back to the heart against the force of gravity.

hope it helps

pls mark me as brainliest if u r happy with the answer