Zoology

Zoology

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Zoology

Clitellum

Biology; Zoology

In annelids, a swelling of the body towards the head of the animal, where the gonads are located. Both oligochaetes and leeches have a clitellum.

Chordate

Biology; Zoology

An animal with a notochord (a cartilaginous rod that extends the length of the body), dorsal hollow nerve cord (a fluid-filled tube that runs the length of the body), gill slits or pouches, and a ...

Chelicera

Biology; Zoology

The first pair of appendages of a chelicerate arthropod. Originally a short clawed appendage, the chelicerae of many arachnids are highly modified for feeding; in spiders, for instance, they are ...

Genus

Biology; Zoology

A category in the classification of plants and animals between species and family; genera- pl.

Gastrodermis

Biology; Zoology

In cnidarians, the endodermis which lines the gut cavity. The term is often used instead of endodermis since cnidarians only have two tissue layers instead of three.