Question

if cell division is necessary for survival, why doesn't your body continue to grow larger during the course of your life?

Answer 1

cells die over the course of life as new ones are formed which makes the body able to grow at a natural pace. Rapid cell division causes cancer because it is cells being crowded from too much cell division.

Answer 2

The body does not grow larger during the course of life due to the regulation of cell division, cell differentiation, and apoptosis.

Most of the cells in an adult are differentiated cells and thus, they do not divide throughout life.

Cells divide only in response to a particular response. They divide to replace the injured, lost, or worn out cells.