liver, bones or eyes do not merely gather together.
They need to branch off even further. For example,
bone cells should be aware of the location of the
bone that they will form within the body. Then they
should go to the correct place accordingly and take
the correct form.
The bone cells in your feet act like a professional
sculptor and form perfectly curved foot bones with the
indentations and projections for the toes. As if they
knew the size of the brain, the bone cells forming
your skull build a smooth bony skeleton that per-
fectly encloses the brain. It is neither too small nor
too big, so it neither squeezes the brain nor
81
parietal bone
frontal fontanel
temporal bone
fontanel
The gaps in
the skull
bones of a
baby disap-
pear in time
as the bones
grow.
frontal bone
occipital
bone
