Question

explain the role of valves in our veins​

Answer 1

Explanation:

The one-way valves in deep veins prevent blood from flowing backward, and the muscles surrounding the deep veins compress them, helping force the blood toward the heart, just as squeezing a toothpaste tube ejects toothpaste.

Answer 2

Answer:

valves on the whole prevent the back flow of the fluid that flows through them