Term
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Definition
| Multicellular, few cell types. Amorphous and asymmetrical. Lack organs; poorly defined tissues. Have cellular level of organization. Ostia and Oscula. Interior is made of spongocoel cells. |
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Term
Phylum Porifera.
Nutrition? |
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Definition
| Sessile suspension feeders. Many secondary metabolites. |
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Term
Phylum Porifera.
Water-Movement? |
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Definition
| Water flows through Ostia (small openings), and exits through large opening (oscula). |
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Term
Phylum Porifera.
Cell Type/Layer: Spongocoel? |
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Definition
| Flagellated cells lining empty interior of sponge. |
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Term
Phylum Porifera.
Cell Type/Layer: Choanocytes? |
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Definition
| Collar cells: flagellated cells lining spongocoel. Generate currents, helping keep flow of water. Capture small food particles. Capture incoming sperm. |
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Term
Phylum Porifera.
Cell Type/Layer: Mesohyl Layer? |
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Definition
| Gelatinous with collagen; adjacent to collar cell layer. Contains live cells. |
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Term
Phylum Porifera.
Cell Type/Layer: Mesohyl Layer: Archaeocytes? |
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Definition
| Amoeboid cells. Help with intracellular digestion. Differentiate into gametes. Aid in elimination of wastes. Aid in repair and regeneration. Secrete supportive elements. |
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Term
Phylum Porifera.
Cell Type/Layer: Mesohyl Layer: Archaeocytes: Supportive Element Sclerocyte? |
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Definition
| Secrete spicules made of CaCO3 (calcium carbonate) or SiO2 (silicon). |
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Term
Phylum Porifera.
Cell Type/Layer: Mesohyl Layer: Archaeocytes: Supportive Element Spongocyte? |
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Definition
| Produce spongin (collagen fibers). |
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Term
Phylum Porifera.
Cell Type/Layer: Pinacocytes? |
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Definition
| Outside layer of sponge. Flattened, contractile, conduct sensory information. |
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Term
Phylum Porifera.
Cell Type/Layer: Pinacocytes: Specialized Pinacocytes Porocytes? |
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Definition
| Small opening, can regulate size of opening and water flow. |
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Term
Phylum Porifera.
Type of Sponge Construction: Asconoid? |
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Definition
| Least complex and smallest flagellated surface area. |
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Term
Phylum Porifera.
Type of Sponge Construction: Syconoid? |
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Definition
| Slightly increased complexity and flagellated surface area. |
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Term
Phylum Porifera.
Type of Sponge Construction: Leuconoid? |
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Definition
| Most sponge species. Most complex and biggest surface area. |
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Term
Phylum Porifera.
Asexual Reproduction? |
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Definition
| Breakage and regeneration. Budding (not common). Gemmule production in freshwater sponges. |
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Term
Phylum Porifera.
Sexual Reproduction? |
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Definition
| Many species hermaphroditic. Fertilized egg in mesohyl; develops into free-swimming, non-feeding larva (amphiblastulla-hollow; parenchymula-solid); metamorphosis into baby sponge. |
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Term
Phylum Porifera.
Unusual Features? |
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Definition
| Regeneration and reaggregation. |
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Term
Phylum Porifera.
Evolution? |
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Definition
| ancestral colonial choanoflagellate -> ancestral sponge -> present-day sponge. |
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