Human physiology, two-part answer: which part of the body generally ages faster than all the others, and which ages generally slower? ~

Skin wise...Face would age fastest because it is the part exposed to the sun the most. Sun exposure causes aging. 

Other wise it depends on the heredity and activities of the person. 

All parts of the body revolve around the sun at the same time. I am answering this question literally. I suppose you could use the word deteriorate instead, in which case, genetically, my skeleton is faster and my good looks slower. This post was edited by Element 99 at November 22, 2019 8:58 AM MST