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 ...

Get pumped up — it's time to show off your knowledge about the heart. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Your heart pumps blood from ...

The heart, as the vital organ that pumps blood to about 73 trillion cells of the human body must be sufficiently active and ...

The heart is well-placed in the upper torso to serve the major organs, which are arranged like satellites around it. It isn’t displaced as far to the left as some people might imagine. However, it is ...