Invertebrates

Animals that have a backbone for support are called .

• Vertebrates

• Invertebrates

• Eukaryote

• Skeleton

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

• Vertebrate

• Backbone

• Bone

• Skeleton

Most invertebrates support their body with a(n)

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

• Internal / exoskeleton

• Hydrostatic / exoskeleton

• Internal / external

• Hard skeleton / soft skeleton

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.

• Insects

• Worms

• Parasites

• Survivors

Snails and slugs are _______ , or members of the phylum

Mollusca.

• Animals

• Invertebrates

• Mollusks

• Disgusting

Roundworms have a(n) skeleton that they use for

movement.

• Internal

• Interstitial

• Hydrostatic

• Flexible

An arthropod has jointed , or structures that extend

from its body.

• Legs

• Anthenae

• Feet

• Appendages

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

adult is called

• Changing

• Metamorphosis

• Evolution

• Fussion

Its name means “spiny skin.”

• Arachnid

• Sponge

• Echinoderm

• Mollusk

It has jointed appendages that extend from the

central part of its body.

• Mollusks

• Arthropods

• Echinoderms

• Cnidarians