Them Bio guys!
As with all Science+Comp.Sci. people, I have the usual snooty way when confronted with students of the gooey human body (and other poor critters and poorer plants).
However, here’s something for the fellow bogged down with human physiology, the examinee, or the plain and simple interested layman. With even my rudimentary knowledge of the subject . . . the site’s really good. The diagrams and body-parts are wonderfully interactive.