Word of the Day
ULNA (UHL-nuh)
The bone on the little finger side of the human forearm
Common clues: Inner forearm bone; Humerus neighbor; Arm bone; Forelimb bone
Crossword puzzle frequency: Once a month
Frequency in English language: 65105 / 86800
Video: Bone and Cartilage Anatomy
The ulna (elbow bone) is a long bone, prismatic in form, placed at the medial side of the forearm, parallel with 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.
the radius along its length via the interosseous membrane that forms a syndesmoses joint.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Ulna".
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