Apologia Biology Module 12

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A body covering, typically made of chitin, that provides support and protection

Exoskeleton

To shed an old outer covering so that it can be replaced with a new one

Molt

The body region between the head and the abdomen

Thorax

The body region posterior to the thorax

Abdomen

A body region composed of the head and thorax fused together

Cephalothorax

An eye made of many lenses, each with a very limited scope

Compound eye

An eye with only one lens

Simple eye

A circulatory system that allows the blood to flow out of the blood vessels and into various body cavities so that the cells are in direct contact with the blood

Open circulatory system

The organ of balance in a crustacean

Statocyst

A general term for the organ that produces gametes

Gonad

Insect development consisting of four stages: egg, larva, pupa, and adult

Complete metamorphosis

Insect development consisting of three stages: egg, nymph, and adult

Incomplete metamorphosis

An exoskeleton, body segmentation, jointed appendages, a ventral nervous system, and an open circulatory system

General characteristics of arthropods

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