The humerus is your upper arm bone. It is the longest bone in the upper part of your body and is connected to many important tendons and ligaments. The top of the humerus is part of the shoulder ...

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 ...

Ball and socket joints also allow flexion and extension. Flexion of the shoulder joint occurs when the humerus (upper arm) moves forwards from the rest of the body, which happens at the end of an ...