| A | B |
|---|
| Casting | Solid waste. |
| Clitellum | A large band of tissue found on a worm. |
| Colony | Several animals living together in a group. |
| Fragmentation | When a small piece of a mature animal breaks off. |
| Gemmule | A small group of sponge cells with a supply of food and a hard protective covering. |
| Larva | Young sponge. |
| Life Cycle | The different stages of an animal's life. |
| Pharynx | Feeding tube. |
| Pore | Small opening. |
| Regeneration | The process of forming a new animal from a fragment. |
| Sessile | Animals that do not move from place to place. |
| Setae | Tiny bristles. |
| Spicule | Very sharp spikes. |
| Spongin | Flexible protein. |
