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 ...

Scientists just published the most detailed map of the developing human heart to date. The atlas includes 75 types of heart cells, including cell types in the heart's valves and the muscles that fuel ...

How did your heart form? What triggered your first heartbeat? To this day, the mechanisms of human heart development remain elusive. Researchers know the heart is the first organ to fully function in ...