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20 Cards in this Set

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Crayfish phylum and class
Phylum Arthropoda
Class Malacostraca
Serial homology
structures were modified over time until they became a "novelty" (e.g. jaws)
Ecdysis
molting
Statocyst
balance
Biramous
branches into 2 (like the claws on the first walking leg)
Uniramous
singular limb (not branched)
How many walking legs does a crayfish have?
10
What is the first pair of walking legs called?
Cheliped
How do you distinguish between a male and female crayfish?
Males have coppulatory swimmerets/vas deferens; females have seminal receptacle/oviduct
Function of maxillipeds
touch, taste, food handling
Function of swimmerets
carry eggs and sperm
Function of uropod
swimming, egg protection
Function of cheliped
grasping food, offense, defense
Function of mandible
crushing food
Function of antennule
touch, taste, equilibrium
Function of antenna
touch, taste
Grasshopper phylum and class
Phylum Arthropoda
Class Insecta
Tracheal tubes
Used for breathing in grasshopper
Sclerites
Chitinous exoskeleton's hard plates on a grasshopper
Spiracles
external opening of the grasshopper's tracheal system