Compare the structure and Function o the cnidocyte in Cnidarians to the colloblast in the Ctenophores.

        The two phyla Cnidaria and Ctentophora penning the radiate animals. Most radiates remove tentacles or oral protrusile projections around the oral drop out that be armed with cells that whitethorn melt in def lay offing team mechanism and capture stone pit. The cells bear witness within the tentacles atomic number 18 structurally and functionally unique to apiece phylum, such as the cindocytes in Cnidarians and colloblasts in Ctenophores.         Cnidarians capture prey with special stinging cells called cindocytes. These cells ar found throughout the shell but be oddly immense in the tentacles. Cnidocytes subscribe to a cilium or special cilium coordinate with a kinetosome at its base. This social system is cognize as the cnidocil and it receives a chemical as rise as tactile stimulation.         The nematocyst is the literal stinging element. The undischarged nematocyst is a little capsule imperturbable of a chitin-like material containing a coil tubular chain that is continuous of the narrow end of the capsule. Fig1 undischarged NEMATOCYST         When the cnidocyte is stimulated to discharge, the nematocyst tissue layer becomes permeable to water, and the high cozy osmotic ram causes fluent to rush into the capsule. The osmotic shove locomote rapidly, out-of-doorsing the operculum and increase the hydrostatic pressure. The increased pressure everts the interweave and drives the nematocyst from the cnidocyte. When the nematocyst is discharged, its cnidocyte is absorbed and a new one replaces it.

        In the Hydra, in that location are three functional types of nematocysts. First, Pentrants, these are comprised of a supply that is open up at the tip and usually armed with barbs and spines. When they are discharged, they click the prey and inject poison. The open end of the thread /filament whitethorn inject protein toxin that produces a sting.                   FIG2 discharge NEMATOCYST Second, some nematocysts function by entanglement such as the volvents. These cnidocytes have a underpass that is closed at the... If you trust to get a all-encompassing essay, order it on our website: Ordercustompaper.com

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