| A | B |
|---|
| Porifera | phylum name for the sponges, means "pore bearer" |
| collar cells | line the inside of the sponge |
| osculum | top opening of the sponge in which water and waste are expelled from the body |
| filter | feeding method used by sponges |
| sessile | organism is attached to one spot, does not move |
| spicules | small needlelike structures made from archaeocytes that are support structures of the sponge, made of calcium carbonate, silica, or spongin |
| Class Demospongiae | contains the majority of the sponge species, have spicules of spongin, silica, or a combination |
| Class Calcarea | sponges with spicules composed of calcium carbonate |
| Class Hexactinellida | glass sponges, have spicules composed of silica that join together to form a netlike skeleton |
| gemmules | seedlike particles formed during adverse conditions that contain sponge cells protected by spicules that will survive the environmental changes |
| asymmetry | type of symmetry do organisms from the Phylum porifera |
| choanocytes | collar cells |
| spongocoel | central cavity in sponges |
| ostia | numerous incurrent pores |
| pinacocytes | lines spongocoel |
| porocytes | Tubular contractile cells that allow water to flow from the outside of the sponge to its central cavity. |
| mesoglea | A gelatinous, protein rich matrix in between the choanocytes and epithelial cells of a sponge. |
| budding | External growth on a sponge, form of asexual reproduction |
| amoebocytes | mobile cells that reside in the matrix between the choanocytes and pinacocytes and carry food to other cells in the sponge |
| mesoglea | a jellylike material between the endoderm and ectoderm of sponges |
| archaeocytes | ingest and digest food caught by the choanocyte collars and transport nutrients to the other cells of the sponge |
