The interior part of the elbow contains primarily bone, which is referred to as the medial epicondyle. The medial epicondyle gives the elbow shape and definition, and forms the skeletal structure of the arm along with the humerus and ulna, which are also bones in the forearm.
The elbow contains many ligaments and tendons in addition to bones. The inner elbow is just one component of the complex hinge-like structure that is collectively referred to as the elbow. The elbow is important for many tasks and activities and is vulnerable to injuries. On the inner elbow, tendons and ligaments may be injured by certain activities, which is referred to as medial epicondylitis.