structure they possess, your
arm and leg muscles do not
tear due to excessive stretching
while you are playing with a
ball. In shape, your blood cells
are globular, their task being to
transport oxygen, which is re-
quired by your body, by means
of blood vessels. Thanks to
their shape, they can easily
flow through the blood vessels
together with the oxygen they
carry. Skin cells, on the other
hand, are clamped together
and closely arranged in a line.
So your skin is impervious to
microbes and water.
Likewise, all other cells
too have the exactly ideal
shapes that are suited to their
tasks. However, it is surely not
by chance that these cells ac-
20
Cells
that divide and multi-
ply as seen in the picture
above then differentiate into
hundreds of different types of
cells, a few of which are
shown below.
muscle tissue
blood cells
nerve cell
skin cells
