How could the adaption of valves in leg vains allow a human to better survive in its environment.

Question

Social Studies

Lainey

2 July, 14:05

How could the adaption of valves in leg vains allow a human to better survive in its environment.

+2

Answers (1)

Know the Answer?

Stephen Lucas · Answer 1

The answer is that healthy legs have veins with smooth, elastic walls that are perfectly designed to adapt to the changes in pressure within a vein. Veins have valves that keep blood moving in one direction: back toward the heart. As the leg muscles are activated, the venous valves open to allow one-way flow in the direction of the heart.