A type of worm that may have an eye spot on its head.

An invertebrate with an exoskeleton, segmented body, and pairs of jointed appendages

An invertebrate with stinging cells and a central body cavity

An invertebrate with an internal skeleton and fluid-filled tube:

A type of worm that looks like a thin tube.

An animal with a soft, unsegmented body often protected by a hard shell:

An asymmetrical animal without tissues or organs:

The simplest animal with a brain:

Hard outer covering is called an:

An internal skeleton is called an:

What type of symmetry do worms have?

Cellular organization of sponges (check all that apply):

Cellular organization of worms (check all that apply):