Here are some useful links that might be useful for your studies:

Technical and Popular Medical Terms
http://allserv.rug.ac.be/~rvdstich/eugloss/EN/lijst.html
This site lists medical terms alphabetically with their non-technical definition.

Wordsmyth English Dictionary-Thesaurus - The Educational Dictionary
http://www.wordsmyth.net
This site is a general academic dictionary and thesaurus. Locate a word's definitions, synonyms and examples of usage.

A Guided Tour of the Visible Human, Washington University
This site actually shows three-dimensional human bodies.

The Visible Human Projects
This site also uses images as a link to the parts of the body.