Question

What is the mechanism of circulation? with digram.

Answer 1

I hope it will help u

Answer 2

Human beings need regular supply of food, oxygen,etc. this function is performed by circulatory system. circulatory system consists of a pumping organ-heart, blood vessels- arteries and veins, blood and lymph. 
1. deoxygenated blood from our body enters through vena cave and flows through the right atrium as it relaxes and then contracts it flows into the lower chamber into the right ventricle as it relaxes and contracts and then flows to the lungs.
2. Oxygenated blood enters through left atrium as it relaxes and contracts then into left ventricles as it contracts and relaxes and then the blood flows via the aorta to the other body parts