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 rate is one of the most powerful—and underestimated—indicators of your cardiovascular health. Understanding how it ...

The human body is a wonderous thing, especially when you consider how intricate and efficient each bodily system is. For instance, an adult’s blood vessels could encircle the earth 2.5 times if ...

Everywhere scientists look for microplastics, they've found them -- food, water, air and some parts of the human body. But examinations of our innermost organs that aren't directly exposed to the ...

Researchers investigated when the body starts exerting more energy to keep itself cool at high temperatures. They found that this upper-temperature limit lies between 40℃ (104F) and 50℃ (122F) when ...

Recognizing the body’s signals of a heart attack can mean the difference between life and death. Heart disease remains a leading cause of mortality globally, yet many people miss or misinterpret the ...

A revealing examination of how microplastics infiltrate the human body, uncovering findings that are more alarming—and more ...

Editor’s note: After surviving for two months with a transplanted pig heart, David Bennett died March 8. “We have gained invaluable insights learning that the genetically modified pig heart can ...