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19 Cards in this Set

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in arthropods, a structure that extends from the body wall
Appendage
role played by an individual insect in a colony
Caste
the body region of some arthropods that consists of a head fused with a thorax
Cephalothorax
paired mouthparts of arachnids and their relatives that are modified into fangs or pincers
Chelicera
: protective capsule enclosing the transforming larva in insects
Chrysalis
eye made of thousands of individual visual units
Compound Eye
small marine crustacean that is a chief food source for many marine species
Krill
slender, fingerlike organ of excretion that opens into the gut of certain arthropods
Malpighian tubule
chewing mouthpart found in many arthropods
Mandible
dramatic physical change through which an immature organism passes as it grows to adulthood
Metamorphosis
a periodic shedding of an arthropod’s exoskeleton; also found in some reptiles
Molting
larval form of a crustacean
Nauplius
juvenile stage of some insects that is a smaller version of the adult
Nymph
: in arachnids, a second pair of appendages that are modified to catch and handle prey
Pedipalp
stage of complete metamorphosis in which an insect changes from larva to adult
Pupa
: modified appendages in arthropods that secrete silk
Spinneret
respiratory opening of certain arthropods that allows for the passage of air into the body
Spiracle
: mid-body region in arthropods
Thorax
in certain arthropods, fine tubes that extend into the interior of the body; used for gas exchange
Tracheae