Zoology

Zoology

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Zoology

Proboscis

Biology; Zoology

Elongated organ, usually associated with the mouth. The proboscis is an important feeding appendage in echiurans.

Precocial

Biology; Zoology

Describes young that are mobile and fairly self-sufficient at birth. Precocial young are generally well-developed (and large) at birth, born with their eyes open, and able to walk. Chickens and ...

Skeleton

Biology; Zoology

Support structure in animals, against which the force of muscles acts. Vertebrates have a skeleton of bone or cartilage; arthropods have one made of chitin; while many other invertebrates use a ...

Syphon

Biology; Zoology

Opening in molluscs or in urochordates which draws water into the body cavity. In many molluscs, the syphon may be used to expel water forcibly, providing a means of propulsion.

Septum

Biology; Zoology

Partition which divides up a larger region into smaller ones, such as in the central body cavity of some anthozoa.

Parapodia

Biology; Zoology

A sort of "false foot" formed by extension of the body cavity. Polychaetes and some insect larvae have parapodia in addition to their legs, and these provide extra help in locomotion.