See how the heart works with this animated diagram.
Use the ‘Start’,‘Stop’,‘Restart’ and ‘Pause’ buttons to control the animation scenes.
For instructional purposes, this animation shows blood flow through the right and left hand sides of the heart separately. In reality, the 2 sides of the heart perform their functions at the same time and blood is flowing through both sides of the heart at the same time.
Your heart is divided into 4 chambers: 2 on the right hand side and 2 on the left. Each upper chamber is known as an atrium and each lower chamber as a ventricle. Blood comes into the heart via the atria and is pumped out via the ventricles.
The right side of the heart pumps blood needing oxygen to the lungs.
The left side of the heart pumps oxygen-rich blood from the lungs to the rest of the body.
Last Reviewed: 17 March 2010
You are under optimum weight for your height. Being underweight can carry health risks for both men and women. Check with your doctor or dietitian to find out if your current weight is healthy for you.
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You are over optimum weight for your height. You may be facing health risks, so see your doctor to help you achieve a healthier weight.