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Module #12

Vocabulary for Module #12: Phylum Arthropoda

QuestionAnswer
Exoskeleton A body covering, typically made of chitin, that provides support and protection
Molt To shed an old outer covering so 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 out 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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