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Created with Fabric.js 1.4.5 Phylum Porifera SPONGES They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them. 5,000 to 10,000 known sponge species Sponges are filter feeders. Most sponges eat tiny, floating organic particles and plankton that they filter from the water the flows through their body. Food is collected in specialized cells called choanocytes and brought to other cells by amoebocytes Most sponges are hermaphrodites meaning they can produce eggs and sperm. Kingdom: Animalia (animals)Phylum: Porifera (sponges) Works Cited ls hub/phylum-porifera nvertzoo/porifera.html m/subjects/invertebrates/spong e/ /information/sea-sponge-facts A sponge reproduces by buddying, where sperm is caught by nearby sponges and fertilization of the egg takes place internally. The resultant tiny larva is released and settles on the ocean floor where it develops and grows into a sponge Why become multicellular? - specialized cells are more efficient multi-taskers- increasing the size of a cell causes problems of exchange - input of nutrients, get rid of waste They can be found in both marine and freshwater environments at any depth, though especially in coral reefs, mangrove habitats, and seagrass ecosystems Sponges are among the oldest animals discovered about 500 million years ago Body grows to various shapes. Most of them are asymmetrical and some are radially symmetrical. The body wall has numerous pores called ostia. The body encloses large cavity called spongocoel. Water enters the spongocoel through the ostia and inter connecting canals present in the body wall.
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