Question

Short / Long type answer type questions.
Why is it more important for arm and leg veins to have valves than it is for neck veins to have valves?

Answer 1

Valves are more important in arm veins and leg veins than in neck veins because, when you are standing, gravity cause pooling of blood in the veins of the free limbs but aids the flow of blood in neck veins back toward the heart.