Description
The bones of the arm and forearm are one of the two groups of bones of the free part of the upper limb, the other group being the bones of the hand.
The arm (brachium) is the longest segment of the upper limb and lies between the shoulder and the elbow joints. It contains a single long bone called the humerus.
The forearm (antebrachium) is the second-longest segment of the upper limb and lies between the elbow and wrist joints. It contains two long bones called the radius and ulna.
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Humerus
It is a trochoginglymoid joint composed of 3 synovial articulations between the humerus, radius, and ulna, and encapsulated within a common synovial capsule.
