New research from Ohio State University reveals genetic differences in the heart's natural pacemaker between men and women.

Many people do, but the heart is actually located almost in the center of ... takes ten of them to equal the thickness of a human hair. Your body has about 5.6 liters (6 quarts) of blood.

Cardiovascular disease can obviously increase the risk of a heart attack, but it can also increase the risk of ...

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 ...