Your rotator cuff includes several muscles that support range of motion in your arm and shoulder while holding the socket in place. The rotator cuff is a group of four muscles that hold your upper arm ...

Deep muscles The abdominal muscles provide postural support, protect internal organs, and perform other important functions. The lower abdominal muscles help protect the pelvic cavity. The rectus ...

The top diagram shows the position of an American alligator's liver and lungs and four muscles or muscle groups that the animals use to shift their lungs forward, backward or sideways to control their ...