aldowaldo

Another search you might find interesting:

http://www.purposegames.com/ww-search.php?q=anatomy

It isn't all about humans, but there's a lot there.

There are 4 that I found via search. Two multiple choice, two image-based.

http://www.purposegames.com/ww-search.php?q=endocrine

I figure that if you want more detail, you may need to make it yourself.

I have this:

http://www.purposegames.com/game/913

But there are many more, try using search in the upper right corner and search for heart, endocrine etc.