Day and night, the muscles of your heart contract and relax to pump blood throughout your body. When blood returns to the heart, it follows a complicated pathway. If you were in the bloodstream ...

the human heart will beat more than 2.5 billion times. Give a tennis ball a good, hard squeeze. You're using about the same amount of force your heart uses to pump blood out to the body.

This clip is an introduction to the human heart. We find out about its location within the body and its function as a pump. The heart sits within the chest cavity between the lungs and is about ...

It also shows how the pacemaker cells restart her heart after the surgery. This short film is from the BBC series, Inside the Human Body. The 3D footage brings the topic to life and would enhance ...

The ribs and rib cage are excellent examples of the human body’s multifaceted ... and they may have a rapid heart rate. The ribs perform vital functions in the body, protecting organs and ...

The human body is, on average, 60 percent water ... When you add that to keeping your heart strong, your emotions steady, and your memory sharp, who doesn’t want to make sure they get enough water?

If we scrutinize the mechanism of the heart, we shall find that it involves ... aorta to force the blood through the vessels of the human body, is estimated by Hales, as being equal per square ...