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| Hexactinellid sponges are sponges with a skeleton made of four- and/or six-pointed siliceous spicules, often referred to as glass sponges. |
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| "The Demospongiae are the largest class in the phylum Porifera. Their ""skeletons"" are made of spicules consisting of fibers of the protein spongin, the mineral silica, or both. " |
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| The calcareous sponges of class Calcarea are members of the animal phylum Porifera, the cellular sponges. |
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| a type of sponge having an oval shape and a thin body wall with pores leading directly into the spongocoel. |
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| a type of sponge having a thick body wall that is folded to form many short canals leading to the spongocoel. |
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Definition
| a type of sponge having a thick body wall with a highly branched canal system leading into the spongocoel. |
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Definition
| one of the flagellated cells lining the inner cavity of a sponge, having a collar of protoplasm encircling the base of the flagellum. |
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| secrete a substance which anchors the sponge to its substrate. |
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Definition
| gives a sponge its flexibility |
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Definition
| They provide structural support and deter predators. |
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| The mouth like opening in a sponge, used to expel water. |
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Definition
| The pinacocytes are on the external surface of the sponge body and characterized as an epithelial layer of flattened cells. |
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Definition
| engulfing and ingestion of particles by the cell or a phagocyte |
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Definition
| especially important in reproduction as the sex cells of the sponge in sexual reproduction |
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Definition
| The central cavity of a sponge, which opens to the outside by way of the osculum |
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Definition
| any of the numerous minute canals lined with choanocytes which radiate from the paragastric cavity in some sponges and end just below the surface of the sponge |
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Definition
| the interior cells of the larva give rise, in the adult, to the cell layer and the different cells |
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Definition
| calcareous or siliceous spicules which are found in the mesohyl layer of sponges |
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Definition
| A cell that secretes spongin fibers in sponges |
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Definition
| secrete fibres and often form net in the cytoplasm |
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Definition
| Having unisexual reproductive organs or flowers, with the organs or flowers of both sexes borne on a single plant, as in corn and pines. |
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Definition
| A small gemma or similar structure, especially a reproductive structure in some sponges that remains dormant through the winter and later develops into a new individual |
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Definition
| commonly referred to as sponges |
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