Waste Accumulation Theory
The waste accumulation theory of aging states that in the course of a life span cells produce more waste than they can properly eliminate. The waste includes various toxins that when accumulated to a certain level they can interfere with normal cell function and ultimately kill the cell.
Limited Number of Cell Divisions Theory
This theory is concerned with the number of cell divisions directly affected by the accumulations of the cells waster products. As more wastes accumulate over time the cells quickly degenerate thus causing aging and ultimately death.
Hayflick Limit Theory
Dr. Hayflick theorized that the aging process was controlled by a biological clock contained within each living cell. Studies done in 1961 concluded that human fibroblast cells (lung, skin, muscle, heart) have a limited life span. They divide approximately 50 times over a period of years and then suddenly stop. They also concluded nutrition seemed to have an effect on the rate of cell division. Final conclusion of this theory states that improper functioning of cells and loss of cells in organs and tissues may be responsible for the effects of...
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