Ancient Egyptian surgery
The oldest metal surgical tools in the world ere discovered in the tomb of Qar .Surgery was a common practice among physicians as treatment for physical injuries. The Egyptian physicians recognized three categories of injuries; treatable, contestable, and untreatable ailments. Treatable ailments the surgeons would quickly set to right. Contestable ailments were those where the victim could presumably survive without treatment, so patients assumed to be in this category were observed and if they survived then surgical attempts could be made to fix the problem with them. They used knives, hooks, drills, forceps, pincers, scales, spoons, saws and a vase with burning incense.
Prosthetics, such as artificial toes and eyeballs, were also used; typically, they served little more than decorative purposes. In preparation for burial, missing body parts would be replaced; however, these do not appear as if they would have been useful, or even attachable, before death.
The extensive use of surgery, mummification practices, and autopsy as a religious exercise gave Egyptians a vast knowledge of the body's morphology, and even a considerable understanding of organ functions. The function of most major organs was correctly presumed—for example, blood was correctly guessed to be a transpiration medium for vitality and waste which is not too far from its actual role in carrying oxygen and removing carbon dioxide—with the exception of the heart and brain whose functions were switched.