| A | B |
|---|
| Porifera | phylum name for sponges |
| spicules | hard structures that help support and protect sponges |
| spongin | flexible material that helps support sponges |
| hydrostatic skeleton | type of support sponges have that uses water pressure |
| diffusion | how sponges get rid of waste and handle gas exchange |
| filter-feeding | take in water with food suspended in it, send water back out while keeping food |
| budding | when a piece breaks off and forms a new sponge |
| asexual reproduction | offspring is exactly like parent genetically |
| sexual reproduction | sperm cell fertilizes egg cell |
| collar cells | specialized cells sponges use for feeding, gas exchange, and waste removal |
| flagella | part of the collar cell that sets up a current through the sponge |
| pores | openings in the sponge |
| invertebrates | animals without backbones |
| asymmetry | type of symmetry for porifera |
| bilateral symmetry | type of symmetry for humans |
| radial symmetry | type of symmetry for starfish |
| hermaphrodite | organism that produces both egg cells and sperm cells |
| sessile | does not move |
