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You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
The meshing of many spicules serves as the sponge's skeleton and thus it provides structural support and potentially defense against predators. [1] Sponge spicules are made of calcium carbonate or silica. Large spicules visible to the naked eye are referred to as megascleres or macroscleres, while smaller, microscopic ones are termed microscleres.
Upload file; Special pages; Search. Search. ... Print/export Download as PDF ... Exopinococytes produce spicules which is a needle like process that serves as ...
While the spicules in most species are triradiate (with three points in a single plane), some species may possess two- or four-pointed spicules. [4] [5] Unlike other sponges, calcareans lack microscleres, tiny spicules which reinforce the flesh. In addition, their spicules develop from the outside-in, mineralizing within a hollow organic sheath ...
Download as PDF; Printable version ... Setting a value for any of the cell or organelle attributes will make its diagram visible ... An example of the template with ...
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Spongilla have a leuconoid body form with a skeleton composed of siliceous spicules. They are sessile organisms, attaching themselves to hard substrate like rocks, logs and sometimes to ground. [ 3 ] Using their ostia and osculum these sponges filter the water for various small aquatic organisms such as protozoans , bacteria , and other free ...