The theories that the mechanical functions of the body simply wear out with age are called the

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Wear-and-tear theories propose that the accumulated damage to cells, tissues, and organs over time eventually leads to age-related functional decline and ultimately death. This theory suggests that the mechanical functions of the body simply wear out with age, which is reflected in the gradual decline of physical abilities such as strength, endurance, and flexibility.

The Theories That the Mechanical Functions of the Body Simply