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

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 ...

Bill Bryson's book "The Body: A Guide For Occupants" is a tour of the fascinating and bizarre ways the human body functions, beginning with the brain and ending with the toes. From the 25 feet of hair ...

There are 118 elements on the period i c table, and you might think we are made up of many of them. But that's not the case; the complex systems that make up our bodies have a surprisingly simple ...

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 ...

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 ...

Renin-angiotensin system, or RAS, is a physiological mechanism essential to human body function. The SARS-CoV-2 virus causes overactivation and malfunction of this system. The RAS regulates innate ...

Cancer is a disease that causes abnormal cells to reproduce and spread to other parts of the body, which can result in tumors or damage to the immune system that may become fatal. Healthy cells follow ...

You have 3 different types of muscle: skeletal, smooth, and cardiac. Skeletal muscle alone accounts for over 650 different muscles. Have you ever wondered how many muscles you have in your body? The ...