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of cnidarians, colloblasts are discharged from the animals' tentacles, and are used to capture prey. However, unlike cnidocytes, which are venomous cells, colloblasts contain adhesives which stick to, rather than sting the prey.

Form and Function

Colloblasts were first described in 1844.

Colloblasts are mainly composed of two cell types, the stalk itself, which is divided into the collosphere and collopod, as well as numerous cap cells that deposit external secretion granules on the

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