The human heart, a fist-sized muscle, tirelessly beats billions of times throughout life, powering every cell by delivering ...

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 ...

The simple, constant rhythm of a beating heart is a reassuring sign of life. With each lub-dub, blood brings life-sustaining oxygen throughout the body. But behind this steady beat is a busy ...

Thump, thump. The pounding rhythm is synonymous with the beat of life itself - the sound of a person's heartbeat. This remarkable organ is a marvel of nature, working nonstop day after day, month ...

A fast heartbeat can be caused by emotions like stress or anxiety. Dehydration, or drinking caffeine or other stimulants, can ...