Biology Module 12 (Study Guide Terms)

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

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

Thorax
The body region between the head and the abdomen

Abdomen
The body region posterior to the thorax

Cephalothorax
A body region composed of the head and thorax fused together

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

Simple eye
An eye with only one lens

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

Statocyst
The organ of balance in a crustacean

Gonad
A general term for the organ that produces gametes

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

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

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