You might have 203 bones, I might have 210. Who knew? On eSkeletons.org, you’ll discover that we are born with more than 300 bones, some of which fuse as we grow. The average human skeleton has 206 bones, but an adult human may have from 200 to 210. This interactive website was created by faculty, staff and students at the University of Texas at Austin so that they — and we — could examine and learn about skeletal anatomy through the school’s osteology database.

You can examine, in detail, the skeletons of 13 primates, from the gorilla, the largest primate, to the tiny mouse lemur. In between, are human, baboon, chimpanzee, orangutan, gibbon, squirrel monkey, marmoset, tarsier, lesser bushbaby, ruffed lemur and slow loris skeletons. Select a primate and a page opens with its frame, whose parts can be illuminated with your mouse. Click on a section to get a list of its bones, which can then be examined individually. In the comparative anatomy section, you can select a specific primate bone and view it from different angles. You’ll also find a taxonomic tree, legend, glossary and FAQs. For students (or others), the “resources” section has downloadable and printable PDFs of puzzles (scramble, jumble, word search and crossword) and bookmarks. There is even a downloadable MP3 of “Them Bones.” If you enjoy this site, you might want to visit the university’s related sites on fossils (efossils.org) or Lucy, one of the most complete Australopithecus afarensis skeletons ever found (elucy.org).