Each one is in two parts-an upper and an under half. The two parts are joined at the sides by a loose skin. In most insects there are three of these ringed segments in the chest and nine in the belly. They overlap one another, and give the body great freedom of movement.
"Teacher says the bodies of all insects are made up of ringed segments like these.""Now, Fred," said Willie, "shall we have something about the head next?""
"Yes, Will," answered Fred, "suppose you tell us all about it.""Well, first of all, the head is in one piece," said Willie. "It is not made up of ringed segments. There is no skull or brain case, because insects have no brains. Teacher says they have instead a number of knots of nerves in various parts of the body.
"The eyes are placed at the side of the head, not in front, so as to enable the insect to see aroundit in all directions. Teacher says they are most wonderful eyes, for each eye is really a close cluster of little eyes. Insects have many enemies. These sharp eyes are almost their only chance of escape.
