This is a biology paper about the Phylum Porifera!!! Uses the example of Sponges(a member of the phylum Porifera)

Essay by blondncrazy817Junior High, 8th gradeA+, April 2004

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The Phylum - Porifera


Sponges do not have a nervous system, brain or any organs. Their body is defined by a system of cells and they have no shape. The cells have a very unique way of working together but they all work for the common good. Amoebocytes carry on other jobs. They can, for example, undergo developmental changes to turn into any other cell type that may be required. As a sponge grows, it weaves its glassy spicules together. Spicules help to give a sponge its form. They act as finger prints. Spicules are usually made of calcium carbonate or oxides of silicon.

