Google Body Browser to navigate the human body and the part that allows it to discover general composition of a web application by Google.
Muscles, organs, nerves and circulatory system: you can share part of the body.
One of the most interesting feature is that you can search for it by browsing dobby part of a certain and webapp that will tell you the name and function of the part. You will be able to enter a name in the search box and it will find it.
In short, if you want to increase your knowledge about the human body, access Google Body Browser, and learn a bit more.