Cells may have a short lifespan due to several reasons:
1. High Turnover Rate: Tissues like the intestinal lining require constant renewal to maintain their function, resulting in a high turnover rate of cells. 2. Exposure to Harsh Environments: Cells such as skin epidermal cells are continually exposed to external stressors, necessitating frequent replacement. 3. Function-Specific Needs: Certain immune cells, such as neutrophils, are designed for rapid response and have a short lifespan to ensure a quick turnover for effective defense.
