The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

The human body is a wonderous thing, especially when you consider how intricate and efficient each bodily system is. For instance, an adult’s blood vessels could encircle the earth 2.5 times if ...

LONDON — British doctors designed a radical solution to save a girl with major heart problems in 1995: They implanted a donor heart directly onto her own failing heart. After 10 years with two ...

Surgeons have developed two low-cost techniques to revive the hearts of people who wish to donate their organs after they die. The methods have been tested on only a small number of people, but they ...