The Visible Human Project by the National Institute of Health a complete, anatomically detailed, digital image database of complete human male and female cadavers reconstructed from CT, MRI and cryosections. It can be used as an anatomical reference for the human body.
Virtual Human Body
The Virtual Human Body is an illustrated human anatomy atlas. It can be used as a whole organism structural reference for human body systems including the lymphatic, cardiovascular, and nervous systems.