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 heart pumps blood from your head to your toes, provides cells with fresh oxygen, and removes waste products. Located in ...

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 ...

When the human body gets hurt, most tissues heal—skin closes over a wound, bone heals itself. But not all organs heal that ...

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 ...

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 ...

The human body has sophisticated defenses against the deposition of calcium minerals that stiffen heart tissues, researchers at the University of Illinois Urbana-Champaign and collaborators at UCLA ...

A new study shows that in some people, their hearts are aging faster than the rest of their bodies. The results showed that unchecked underlying health conditions made people's hearts age years faster ...

Smithsonian biologists are using heart monitors designed for humans to study how high stress levels in animals can hinder ...