Shaft of the humerus

Definition

The shaft of the humerus is the long, cylindrical middle portion of the humerus, which is the upper arm bone connecting the shoulder to the elbow. It serves as an attachment site for several muscles and supports the arm's weight and movement.

Related terms

Proximal Humerus: The top part of the humerus that connects to the shoulder joint, facilitating arm rotation and elevation.

Distal Humerus: The lower end of the humerus that forms part of the elbow joint, allowing for flexion and extension of the forearm.

Medullary Cavity:

The central cavity within the shaft of long bones like the humerus where bone marrow is stored and produced