Animals that do not have a(n) _______________ are called invertebrates

Most invertebrates support their body with a(n)

skeleton or a(n) , but a few have an endoskeleton.

Some invertebrates are , which are animals that survive

by living inside or on another organism, get food from the organism, and do not

help in the organism’s survival.

Snails and slugs are _______ , or members of the phylum

Mollusca.

Roundworms have a(n) skeleton that they use for

movement.

An arthropod has jointed , or structures that extend

from its body.

The process of an insect changing body form as it grows from an egg to an

adult is called

Its name means “spiny skin.”

It has jointed appendages that extend from the

central part of its body.

It has bilateral symmetry and a flat body shape.

It has a mantle, or a thin layer of tissue, that

covers its internal organs.