The arm extends from the shoulder to the wrist, including the upper arm and forearm. Different muscles may work together in intricate ways to help the arm, wrists, fingers, and hands function. Knowing ...

The muscular system works to control the movement of our body and internal organs. Muscle tissue contains something called muscle fibers. Muscle fibers consist of a single muscle cell. They help to ...

We live in a muscle-obsessed culture. If you train smart and hard, you don't need to spend every day in the gym, though. Build your upper body with chest presses, rows, lateral raises, bicep curls, ...