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nematocyst

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nem·a·to·cyst (nm-t-sst, n-mt-)
n.
A capsule within specialized cells of certain coelenterates containing a barbed, threadlike tube that delivers a paralyzing sting.

nematocyst
[nem′ətōsist′]
Etymology: Gk, nema, thread, eidos, form, kystis, bag
a capsule containing a barbed, threadlike process found in certain cells on the external surface of cnidarians, such as the Portuguese man-of-war and jellyfish. The nematocysts of some cnidarians can penetrate the skin and inject a poison, causing painful and potentially fatal injury.


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Anemones are members of the Cnidaria family, which includes Hydroids and jellyfish: all of these animals are equipped with microscopic stinging structures called nematocysts located at the end of their tentacles.
These stinging cells are called nematocysts (neh MAT oh sistz).
Most neomenioids are predators on octocorals or hydroids, whose nematocysts are seen in their midguts.
 
 
 
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