| A | B |
|---|
| Asymmetrical | an organism without a definite shape; ex. sponge |
| Radial Symmetry | an organism's body parts are arranged in a circle around a center point; ex. jellyfish |
| Bilateral Symmetry | an animal that can be divided into right & left halves; ex. all land animals |
| Invertebrate | an animal without a backbone |
| Vertebrate | an animal with a backbone |
| Phylum Porifera | means "has pores"; includes sponges |
| Poriferan | a sponge |
| Pores | tiny openings or holes |
| Sessile | unable or cannot move |
| Collar Cells | special cells that allow a sponge to filter feed |
| Amoebocytes | special cells found in sponges that have the amazing ability to change into other types of cells |
| Filter-Feed | the process of filtering food particles from water |
| Spongin | the material that makes some sponges soft |
| Spicules | the material that makes some sponges hard and rigid |
| Toxin | a poison |
| Epithelial Cells | act like "skin cells" for the sponge; protect it |
| Regeneration | the ability to re-grow missing body parts or the individual itself |
| Hermaphrodite | an organism with both male and female reproductive parts |
| Larva | the "juvenile" stage of a developing organism |
