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Organisms displaying eutely are often used in research concerning developmental biology and aging, as their constant cell number allows ease of study. The nematode Caenorhabditis elegans is considered a model organism for this reason.

The term “partial eutely” can be used to describe organisms that show eutely in one stage of their life, or in certain tissues and organs as adults. Among these, insects and annelids can sometimes show eutely in their larval stages. In adulthood, some arthropods show cell constancy in nervous organs, sensory organs, and in certain tissues. Some adult annelids may show this characteristic in specific tissues as well.