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Spongia officinalis, better known as a variety of bath sponge, is a commercially used sea sponge. [2] Individuals grow in large lobes with small openings and are formed by a mesh of primary and secondary fibers.
Asconoid sponges seldom exceed 1 mm (0.039 in) in diameter. [18] Diagram of a syconoid sponge. Some sponges overcome this limitation by adopting the "syconoid" structure, in which the body wall is pleated. The inner pockets of the pleats are lined with choanocytes, which connect to the outer pockets of the pleats by ostia.
Depending on the body plan of the sponge (which can be asconoid, syconoid, or leuconoid), the spongocoel could be a simple interior space of the sponge or a complexly branched inner structure. Regardless of body plan or class, the spongocoel is lined with choanocytes , which have flagella that push water through the spongocoel, creating a current.
Sponge anatomy (19 P) Pages in category "Sponge biology" The following 9 pages are in this category, out of 9 total. This list may not reflect recent changes. I. 24 ...
The choanoderm is a type of cell layer composed of flagellated collar cells, or choanocytes, found in sponges. [1] The sponge body is mostly a connective tissue ; the mesohyl , over which are applied epithelioid monolayers of cells , the outer pinacoderm and the inner choanoderm.
This improves both respiratory and digestive functions for the sponge, pulling in oxygen and nutrients and allowing a rapid expulsion of carbon dioxide and other waste products. Although all cells in a sponge are capable of living on their own, choanocytes carry out most of the sponge's ingestion, passing digested materials to the amoebocytes ...
Covering the sponge is a layer of cells known as the pinacoderm, which is composed of pinacocytes. In a sponge, pinacocytes are a thin, elastic layer which keeps water out. Between the pinacocytes, there are the porocytes that allow water into the sponge. Myocytes are small muscular cells that open and close the porocytes. They also form a ...
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