How cell division is important for replacement and repair specific eamples?

Answer 1

Upwards of 50 trillion cells die in your body every day. Causes of cell death include poisoning, infection, lack of oxygen, and overheating.

If a cell fails to divide in due time, it becomes too large to carry out its necessary functions to all crucial areas of the cell. This uncontrolled death not only affects the dying cell, but the cells around it. The cell swells up and its contents leak away, potentially damaging any surrounding cells.

Each day, millions of these dying cells are "committing suicide" through a release of chemicals in the mitochondria, if a potentially hazardous factor is detected in the cell. While it does seem to be a strange mechanism, this newly discovered phenomenon of a cell's ability to self-destruct--to prevent the replication of flawed cells--is vital to our bodily development, and health as a whole.

While cell suicide is far less detrimental to the health of surrounding cells than an uncontrolled death, a cell undergoing division properly is promoting growth, repair and replacement, rather than destruction. The trillions of cells dying in our body each day are being readily replaced, to help to repair the affected system.

A specific and simple example of the importance of cell division can be seen in observing our skin cells. Our skin is vital to our body's homeostatic activity. We shed around 40,000 skin cells every hour, and to compensate, human skin is constantly regenerating itself.