(See page 95.) There are about two hundred bones in all.

They are of many different shapes.

They vary in size from the little bones of the ear, which are the smallest, to the upper bone of the leg, which is the largest in the body.
~3.~ The skeleton is divided into four parts: the _skull_, the _trunk_, the _arms_, and the _legs_.

We must learn something more about the bones of each part.
~4.

The Skull.~--The _skull_ is somewhat like a shell.