Explain how cnidocytes with their nematocysts function in food capture and defense.

Stinging nematocysts work essentially for the catch of prey, and optionally as a resistance component. There are many sorts of nematocysts, for example, those that capacity to infuse poisons to immobilize prey, and those which serve to snare and clutch the expected feast by wrapping around it. Types of cnidarian jams shift in the sorts of nematocysts they have, and this can be utilized to some degree in grouping and identification.