Question

What are the functions of veins? Why do veins have valves?​

Answer 1

Answer:

Veins are vessels of the circulatory system that support circulation by conveying blood to the heart. Blood flowing through the circulatory system transports nutrients, oxygen, and water to cells throughout the body.

Valves are flaps insideveins that control the direction of blood flow. 

hope it helps...

please mark me as branliest..

Answer 2

Explanation:

Function of veins :-

1)The function of veins is to carry deoxygenated blood.

2)It carries waste of blood

3)It carry blood from heart

4)Pulmonary vein carry oxygenated blood

5)It transport nutrients

Why veins have valves ?

Veins have valves to give unidirectional flow to blood