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 health is about more than just the heart itself. It's a two-way street between the heart and the rest of the body. However, many U.S. adults aren't aware of the connection between organs.

The chambers of the heart operate as a ‘double-pump’ system for the body’s circulation. In coordination with valves, the chambers work to keep blood flowing in the proper sequence. The chambers on the ...

Your heart pumps blood from your head to your toes, provides cells with fresh oxygen, and removes waste products. Located in the middle of your chest and tilted slightly to the left, your heart pushes ...

Science writer Mary Roach is fascinated by the human body, especially, she says, the "gooey bits and pieces of us that are performing miracles on a daily basis." Take the human heart, for instance. If ...

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 ...