Human evolution is often told as a tidy story of adaptation, yet some of our most familiar body parts still defy ...

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 ...

The heart is a complex organ that pumps blood throughout the body. It sits in the chest, slightly left of center, behind the breastbone, and between the lungs. A heart that is not healthy does not ...

Does the human body contain any truly useless parts? Arguably, yes — but they might not be the ones you assume. Some body parts, like the male nipple, arguably serve no useful function. But others, ...

Some human body parts have become useless over the past few million years. These include wisdom teeth, the tail bone, and the muscle fibers that produce goose bumps. Take a look at nine body parts ...

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Your heart is a muscular organ that helps circulate your blood, which delivers oxygen and nutrients to your tissues. There are four chambers and four valves in your heart, and each ensures proper ...

The body is, for all intents and purposes, an extraordinarily complex machine. This requires a multitude of parts all working together in complicated relationships from the micro- to macromolecular ...

An organ is a group of tissues that work together to perform a specific task in the body, such as digesting nutrients or producing chemical messengers that enable brain cells to communicate. Although ...