For starters, the larvae (caterpillars) of butterflies eat ONLY leaves of plants. Different caterpillars like to eat certain kinds of plants. The leaves allow the caterpillar to grow and get all of the vitamins needed to transform into a beautiful butterfly.
The nerve system, sensory organs and legs. . The body. The body of a spider has two distinct parts. The first, front, part consists of a fused head and breast part, called as prosoma or cephalothorax.It is made from a hardened material, called chitin. The second, rear, part is the soft abdomen, called opisthosoma. A tiny tube called pedicel connects the cephalothorax and abdomen.he first, front, part consists of a fused head and breast part, called as prosoma or cephalothorax. It is made from a hardened material, called chitin. The second, rear, part is the soft abdomen, called opisthosoma. A tiny tube called pedicel connects the cephalothorax and abdomen.
Spiders make many kinds of silk. The best known is dragline silk which the spider uses in web construction and also for hanging around. Dragline silk consists of proteins called spidroins. These are made in the spider's silk glands as a thick paste that is drawn into fibers during spinning.