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24 Cards in this Set
- Front
- Back
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appendages
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jointed extensions such as legs and antennae
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chitin
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a tough polysaccharide that makes up the exoskeleton
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compound eyes
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eyes made of individual light detectors, each with its own lens
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molting
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process in which an arthropod periodically sheds its exoskeleton and makes a new one
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trilobites
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extinct arthropod that had many body segments that each had a pair of appendages
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tagma
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structure composed of several fused body segments
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mandibles
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jawlike mouthparts
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chelicerae
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pincerlike mouthparts
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nauplius
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free-swimming larva of a crustacean
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cirri
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six pairs of long legs that extend through openings in barnacle shells and weep organisms and food particles from the water toward the mouth
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isopods
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crustacean with seven pairs of identical legs and no caripace
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decapods
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crustaceans that have five pairs of legs used for locomotion
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cephalothorax
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major section of a crayfish that consists of the head and the the thorax
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carapace
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single tough covering over the cephalorhorax
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abdomen
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tagma behind the cephalothorax hthat is divided into six sections
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antennae
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two pairs of these touch, taste, and balance
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antennules
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branched portion of antennae
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chelipeds
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most anterior pair of walking legs that end in large pincers
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swimmerets
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attached to anterior abdominal segments. create water currents and function in reproduction
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telson
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unpaired, terminal abdominal segment of crayfish
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uropods
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flattened posterior appendage on a crayfish
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digestive gland
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gland near the stomach that secretes enzymes to help in digestion
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green glands
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excretory organs in a crayfish near the eyes
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pedipalps
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aid in holding food and chewing in arthropods
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