The hamstrings are made up of three major muscles. Together they're responsible for hip and knee movements for walking and more. This article breaks it down, including videos and visuals.

Get to know the anatomy of the leg muscles — that's everything below the all-powerful glutes — and your hard work will show for it.

Muscle actin purified from rabbit back and leg muscles and labeled with fluorescein isothiocyanate, and nonmuscle actin purified from lamb brain and labeled with lissamine rhodamine B sulfonyl ...

The rotator cuff is made up of four muscles that hold your shoulder in place. It helps you perform all the movements of your upper arm and shoulder.