Chemicals in sunscreen get into the blood at levels high enough to warrant further testing on their safety, according to a new FDA study.

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 ...

Heart disease kills 18 million people each year, but the development of new therapies faces a bottleneck: no physiological model of the entire human heart exists -- so far. A new multi-chamber ...

After severe heart failure, the ability of the heart to heal by forming new cells is very low. However, after receiving treatment with a supportive heart pump, the capacity of a damaged heart to ...

The calf muscles play a vital role in blood circulation. They are often called the body's second heart. Strong calf muscles improve venous return and prevent blood pooling. Sedentary lifestyles weaken ...

Biomedical engineer Nenad Bursac, standing, and postdoctoral associate Tianyu Wu image a heart tissue patch through a microscope at the Bursac lab at the Duke University Pratt School of Engineering.