01 / Location & anatomical relationships
Where the upper arm meets the two forearm bones.
02 / Structure & organization
The elbow region includes humeroulnar, humeroradial and proximal radioulnar articulations. A shared capsule encloses the main articulations, while collateral and annular ligaments provide support. Flexion and extension occur alongside forearm rotation.
03 / Function
It bends and straightens so you can move your hand closer to your body.
04 / Mechanism
The humerus and ulna mainly make a hinge for bending. A nearby connection with the radius helps the forearm rotate. Cartilage covers the moving surfaces, and ligaments help keep the bones aligned.
Part of a bigger picture
The elbow belongs in our arms & hands collection. Explore the nearby parts to see how this area of the body fits together.
Explore arms & hands →FOR DEEPER STUDY
Connect structure with function
Supination and pronation involve the radius rotating relative to the ulna. They are not simply side-to-side movements of the hinge between humerus and ulna.
Check your understanding
Locate the elbow in relation to its neighbors. Explain how the structural features described above support its function, then distinguish it from a nearby structure with a different role.
Keep learning
Continue with OpenStax Anatomy and Physiology for system-level study. This atlas is educational and has not undergone independent medical peer review.