Theory 4: Wear-and-Tear Theory

  • The wear and tear theory of aging was first introduced by Dr. August Weismann, a German biologist, in 1882.
    •  It is very logical because it is what happens to the nonliving things that people observe around them (i.e. components of an aging car break due to repeated use).
  • Cells and tissues have vital parts that wear out resulting in aging.
    • Parts of the body eventually wear out from repeated use killing the parts and then the body.