picture of proximal, middle and distal phalanges

Move the cursor over the shaded areas to identify bones and articulations.

Bone & Joint Structure:

The body of the phalanx is relatively long and smooth. The proximal end of the phalanx is its base and is concave in shape. The distal end of the phalanx is the head and is relatively convex. The distal articular surface is smaller than the proximal articular surface.

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Lorie Richards and Janice Loudon, October 1997