echo skeleton in the animal/insect world refers to what? Where can I reference the subject?

Answer 1

Instead of an internal skeleton, the goliath beetle, like other insects and crustaceans, has an exoskeleton covering the outside of the body. This exoskeleton provides support for the body much as an internal skeleton does in higher animals. It also provides protection from predators. The exoskeleton is composed of a hard, waterproof, proteinaceous material called chitin. The one main drawback to this type of skeleton is that it does not grow along with the rest of the animal and must periodically be shed in a process called molting.

Answer 2

do you mean exoskeleton? if so, it's the outer shell of insects and bugs.

Answer 3

skin