| A | B |
|---|
| invertebrate | animal without backbone |
| pores | small holes in sponges that let in water |
| collar cell | cell with whiplike tail that moves water within a sponge |
| hydra | hollow sac animal that lives in fresh water |
| absorb | to take in digested food and make it part of an organism's body |
| tentacles | unjointed arm like parts of some animals |
| coral reef | large mound formed from coral |
| flatworms | group of worms with flat bodies |
| secrete | to give off material through cells |
| parasites | organisms that live off of another living thing |
| roundworms | group of worms with round bodies |
| segmented | when a body is made up of seperate parts |
| mantle | thin piece of skin that covers the body of a mollusk |
| bivalve | mollusk with two shells |
| arthropods | animals with jointed body parts |
| crustaceans | group of arthropods that includes shrimp and lobsters |
| tube feet | tiny legs that are used for moving and eating |
| antennae | long thin parts on an insect's head |
