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 ...

Your Blood Vessels Could Circle Earth Four Times Laid end to end, an adult's blood vessels could circle Earth's equator four ...

Pediatrician Whitney Casares' new "My One-Of-A-Kind Body" shows kids ways to reframe the way they view their own bodies and ...

Your anatomy operates like a machine, it's success hinging on the work of over 70 organs, each with a unique function. From the heart's blood-pumping ability to the liver's filtering power, each ...

Researchers have developed a promising synthetic heart valve that may eventually be used for growing children. Harvard’s Wass Institute and John A. Paulson School of Engineering and Applied Sciences ...