Each brain is divided into two equal and complete halves, thus making two pairs of brains.
5.

The brain is largely made up of very small objects called nerve or brain cells.
6.

The nerve cells send out very fine branches which form the nerves.
7.

The nerve branches or fibres run to every part of the body.

They pass out from the brain to the rest of the body through a number of openings in the skull.
8.