NORMAL PROCESS OF GROWTH AND DIFFERENTIATION (NORMAL PROCESSES OF GROWTH AND DIFFERENTIATION)
The normal processes of growth and differentiation are involved both in creating new human beings and in repair and renewal. Every human being develops from the union of just two specialised cells—the sperm and the egg. An embryo which is only a few days old consists of a small number of very similar looking cells. Within only a few months, these multiply, differentiate and organise themselves into a complex human being with all its different parts and functions.
Throughout life, orderly, controlled growth and differentiation continues, keeping our bodies in normal working order. The baby grows to an adult. New cells replace old, worn out ones. Injuries are repaired—after an injury cells multiply, differentiate and arrange themselves so as to reproduce the original structure as accurately as possible, hor example, it you break your leg, cells which can develop into bone multiply to fill the break, mature and start to form strong bone. Damaged muscle cells, fat cells, skin cells etc are also replaced and arrange themselves so as to restore the original shape and strength of your leg as accurately as possible.
Clearly, the most incredibly complex and delicate mechanisms must exist in our body to control the normal processes of growth and differentiation. What happens if these mechanisms go haywire?
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