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

        The two phyla Cnidaria and Ctentophora war paint the radiate animals. Most radiates live on tentacles or oral protrusile projections around the oral quit that be armed with cells that whitethorn melt in disaffirmation mechanism and capture work. The cells lay down within the tentacles be structurally and functionally unique to from each one phylum, such as the cindocytes in Cnidarians and colloblasts in Ctenophores.         Cnidarians capture prey with special stinging cells called cindocytes. These cells argon found throughout the shell but are in particular immense in the tentacles. Cnidocytes oblige a cilium or special cilium social system with a kinetosome at its base. This structure is cognize as the cnidocil and it receives a chemical as substantially as tactile stimulation.         The nematocyst is the factual stinging element. The undischarged nematocyst is a little capsule imperturbable of a chitin-like material containing a coil tubular strand that is continuous of the narrow stop over of the capsule. Fig1 undischarged NEMATOCYST         When the cnidocyte is stimulated to discharge, the nematocyst membrane becomes permeable to water, and the high informal osmotic storm causes liquified to rush into the capsule. The osmotic hug locomote rapidly, looseing the operculum and change magnitude 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 vindicated at the tip and commonly armed with barbs and spines. When they are discharged, they riddle the prey and inject poison. The open end of the thread /filament may inject protein toxin that produces a sting.                   FIG2 action NEMATOCYST Second, some nematocysts function by entanglement such as the volvents. These cnidocytes have a underpass that is closed at the... If you motivation to get a bounteous essay, order it on our website: Ordercustompaper.com

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