Medically reviewed by Jennifer Steinhoff, MD The humerus is your upper arm bone. It is the longest bone in the upper part of ...

Muscles which move the knee are quadriceps and hamstrings. Ball and socket joint. Articulating bones are humerus and scapula (the clavicle is not part of the shoulder joint). Allows a great range ...

Muscles are attached to bones by tendons. Muscles contract to move our bones by pulling on them. However, muscles can only pull; they cannot push. This is why they usually work a joint in pairs.