The human body can grow in several ways. The
process that makes it possible is cell division.
At the beginning every human being comes from one
cell. This cell divides over and over again and
we soon become a mass of cells. Certain areas of
these cells become our organ systems (i.e.
Circulatory system, nervous system, skin, bones,
and eyes). These then grow further until we are
born. After that we have all the specific parts
of our body and we "grow up".
happens the same way as before cell division. But
the direction and magnitude of the growth is
controlled very carefully by a hormone called the
Human Growth Hormone or HGH for short. Most of
this growth happens by the time you reach college
(18-20) but it varies from person to person. Some
people have genetic disorders where they never
stop growing and these people end up growing very
tall but often have shortened life spans.
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