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18 Cards in this Set
- Front
- Back
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Exoskeleton
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A body covering, typically made of chitin, that provides support and protection
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Molt
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To shed an old outer covering so that it can be replaced with a new one
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Thorax
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A body region between the head and the abdomen
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Abdomen
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The body region posterior to the thorax
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Cephalothorax
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A body region composed of the head and thorax fused together
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Compound eye
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An eye made of many lenses, each with a very limited scope
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Simple eye
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An eye with only one lense
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Open circulatory system
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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
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Walking legs
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These appendages are used for locomotion when the crayfish is on land or moving on the bottom of the lake or river in which it lives
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Swimmerets
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These aid in swimming as well as reproduction. In male crayfish, the first and second swimmerets transfer sperm to the female during mating. In females, the swimmerets carry both eggs and the developing offspring.
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Uropods and telson
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These appendages form the flipped-shaped tail that the crayfish uses for swimming.
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Chelipeds
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The chelipeds (usually called "claws") are used for defense as well as swimming
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Antennules
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These small antennae aid the creature in balance and provide taste and touch sensations
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Antennae
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These longer appendages are much more sensitive than the antennules, providing the crayfish with strong senses of taste and touch
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Statocyst
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The organ of balance in a crustacean
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Gonad
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A general term for the organ that produces gametes
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Complete metamorphosis
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Insect development consisting of four stages: egg, larva, pupa, and adult.
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Incomplete metamorphosis
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Insect development consisting of three stages: egg, nymph, and adult.
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