It takes a certain amount of time for the cell cycle to complete. The period of the cell cycle is called the natal period.
The cell cycle is controlled by a genetic program.
The cyclin-cdk complex provides intrinsic stimulation of the cell cycle.
Hormones and growth factors provide extrinsic stimulation of the cell cycle.
When cut in any part of the body, the growth factor is produced. Stimulation of this growth factor causes the surrounding cells to divide and repair the wound.
White blood cells make growth factors for the body’s immune system.
Erythropoietin is produced in the kidneys. Erythropoietin helps the bone marrow produce red blood cells.
The P53 protein stops the cell cycle when the cell’s DNA is severely damaged.
P53 protein causes cell death by apoptosis process when cell DNA is severely damaged.
Abnormal or uncontrolled cell cycle disrupts the growth and development of the organism. Can even cause cancer.