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Arm Bone Anatomy: Which Humerus Region Articulates with the Radius?

Identify the humeral surface that contacts the radial head and distinguish it from the trochlea, styloid process, and olecranon.

Question

Which region of the humerus articulates with the radius as part of the elbow joint?A. trochleaB. styloid processC. capitulumD. olecranon process

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Evidence boundary

This answer retains all four choices from OpenStax Anatomy and Physiology 2e, Chapter 8 Review Question 17. It describes normal adult upper-limb anatomy and distinguishes a humeral articular surface from nearby projections and the wrist. No specimen, radiograph, or clinical injury is supplied or inferred.