Elbow and Arm

The elbow is made up of 3 bones, the Humerus (upper arm) and the Radius and Ulna (the two forearm bones).

As a result there are 3 joints as both forearm bones move on the upper arm and move on each other.

The main movements at the elbow are therefore flexion and extension (bending and straightening) and pronation and supination (turning the palm to face up and down).