Question

Why are valves present in heart and veins

Answer 1

The main function of the valves in veins is to prevent back flow of blood. Blood in the arteries, after being pumped by the heart, are under much higher pressure than blood in veins so there is no need for valves in arteries to prevent back flow.

Answer 2

Good morning:-) The answer is: To make the flowing of blood pressure in One Direction only....