Ulna

From EvoWiki

The ulna is one of the two bones of the lower arm. The ulna is medial to the radius.

The ulna articulates with:

• the humerus, at the elbow as a hinge joint.
• the radius, near the elbow as a pivot joint, this allows the radius to cross over the ulna in pronation.
• the distal radius, where it fits into the ulna notch.

http://en.wikipedia.org/upload/a/ac/Gray213.png http://en.wikipedia.org/upload/4/47/Gray214.png

(from the 1918 Gray's Anatomy)

This page is part of the EvoWiki Encyclopedia of Anatomy and Physiology. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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