A single tentacle has several nematocysts which can be viewed as small bumps on the surface of the tentacle. Nematocysts contain the stinging cells (cnidocytes). Label the nematocysts and cnidocytes and other parts observed in this 100x magnification of a tentacle

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A: Ascaris are worms classified as nematodes.

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A: false

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A: Crayfish are crustaceans found in freshwater. They belong to phylum Arthropoda.

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A: The nematodes are roundworms that are parasitic and are also found in soil and marine ecosystem.

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Dissection

Dissection is the process of cutting up the tissue of a dead or live animal or plant, to do anatomical studies and surgical treatments. The purpose of dissection is to learn more about the overall structure of organs and organ systems and thereby understand the physiology of the organism.