scientificillustration:

“Diagram made for the House Committee showing the trajectory of the missile through President Kennedy’s skull. The rear wound corresponds with the small entry wound above. The skull fragments are shown exploded for illustrative purposes; most stayed attached to the skull by skin flaps, which are being pulled forward by the gloved hand in the autopsy photo and drawing.”

http://www.tutorgigpedia.com/ed/John_F._Kennedy_autopsy