What is the instruction manual for your body?

Unfortunately, I don't think that there is one. If you are religious, the scriptures say a lot about the body, and other than that there are medical texts and texts on the mind and all sorts of things about the body... but nothing specific like an instruction manual from the manufacturer. :)

It would be nice to have something that told you stuff about your individual model, etc. ... I just don't think that it is that easy. :)