Question

veins contain valves. why?
what's your name my army friends and you are girl or boy?​

Answer 1

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.

Explanation: hope this will help u army !!

hi my name im jiya I'm girl

What is your name ?

Answer 2

Answer:

unlike arteries , veins contain valves that ensure blood flow 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.

Explanation:

I am a girl name -monika

I will be your army friend

will you be my friend

thank u for thank