Carpus and tarsus of land vertebrates

Forelimb skeleton of orang-utan, dog, swine, cattle, tapir, and horse
Accessory tarsal bones of human foot. Os trigonum is number 30.

The carpus (wrist) and tarsus (ankle) of land vertebrates primitively had three rows of carpal or tarsal bones. Often some of these have become lost or fused in evolution.

See also

References

  1. Cluett, Jonathan (August 2003). "Os Trigonum". About.com. Retrieved December 2009.


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