But the strongest muscle by weight is the masseter, a chewing muscle in the jaw, D'Agostino said. It is small, but it has many fibers packed into it and has a perfect 90-degree insertion angle on the ...

One of the main functions of the skeleton is to protect our squishy internal organs, but another important function is to ...

The human body requires protein as one of its fundamental nutritional elements, and it is known as the 'building block of the ...

We all know there's a heart in the body; we've been reading about it since childhood. As long as it beats, humans live. Let's ...

When we sleep, the body releases its 'growth hormone', building up and repairing muscles and bones – but the details of how and why have been something of a mystery, until now.