Term
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Definition
Crustacea
Malacostraca (Crayfish, lobsters, crabs, shrimp, isopods)
Cambarus |
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Term
| Malacostraca Outside Body Structure |
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Definition
Two pairs of antennae
Biramous appendages
One pair of mandibles
Two pairs of maxillae
Marine, freshwater, terrestrial |
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Term
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Definition
| Pointed region between eyes |
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Term
OUTSIDE BODY
Compound Eyes |
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Definition
Detects light
Forms visual images |
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Term
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Definition
Longer modified paired appendages for chemosensory and tactile reception
True antennae |
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Term
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Definition
| Shorter modified paired appendages for chemosensory, tactile, and equilibrium (crayfish) reception |
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Term
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Definition
Two sets of short paired appendages near ventral mouth
Holds food while eating |
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Term
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Definition
Three sets of paired appendages near ventral mouth
Holds and manipulates food |
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Term
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Definition
Hard, chitinous mouthparts
Grinds food into mouth |
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Term
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Definition
| Ventral opening to digestive tract |
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Term
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Definition
Large pinchers
Grasping food and defense |
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Term
OUTSIDE BODY
Walking Legs (periopods) |
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Definition
| Locomotion (land and stream bottom) |
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Term
OUTSIDE BODY
Swimmerets (pleopods) |
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Definition
Locomotion (swimming)
Abdominal appendages
Biramous |
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Term
OUTSIDE BODY
Copulatory Swimmerets (male) |
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Definition
First two pairs
Larger, club-shaped
Transfers sperm during copulation from male to female
Sperm duct (between the fifth pair of walking legs) |
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Term
OUTSIDE BODY
Uropod and Telson (tail) |
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Definition
Pair of broad, fan shaped posterior end
Rapid movement
Directional control during leisurely locomotion
Tail fan (swimming backwards) |
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Term
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Definition
Terminal point of digestive system
Ventral surface of telson |
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Term
OUTSIDE BODY
Cephalothorax |
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Definition
Contains walking legs, maxillipeds, carapace, and chelipeds
Anterior end |
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Term
OUTSIDE BODY
Copulatory Swimmerets (female) |
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Definition
First two pairs
Long hair-like setae on edges of swimmerets
Attaches eggs there and are brooded until they hatch
Seminal receptacle (between the fifth pair of walking legs) |
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Term
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Definition
| Dorsal exoskeleton in cephalothorax |
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Term
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Definition
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Term
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Definition
| Passageway from mouth to cardiac portion of stomach |
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Term
INSIDE BODY
Cardiac Chamber of Stomach |
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Definition
Thick-walled anterior portion of stomach
Contains gastric mill |
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Term
INSIDE BODY
Pyloric Chamber of Stomach |
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Definition
Thin-walled chamber
Chemical digestion of food |
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Term
INSIDE BODY
Digestive glands |
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Definition
| Secrete enzymes into pyloric stomach to facilitate chemical breakdown of food |
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Term
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Definition
Nutrients are absorbed into bloodstream
Delivers to body tissues |
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Term
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Definition
Pumps blood to body tissues through arteries
Ostia allows blood into heart |
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Term
INSIDE BODY
Dorsal Abdominal Artery |
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Definition
Longitudinal blood vessel
Distributes blood to the dorsal aspect of the abdomen |
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Term
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Definition
Paired excretory glands
Released through nephropores |
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Term
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Definition
Sperm production
Vas Deferens from testes to sperm duct |
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Term
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Definition
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Term
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Definition
Dorsal to the green glands
Houses majority of neural ganglia |
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Term
INSIDE BODY
Circumesophageal Nerves |
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Definition
Branches of the ventral nerve cord
Encircles esophagus before merging with the ventral surface, posterior to the esophagus |
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Term
INSIDE BODY
Ventral Nerve Cord |
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Definition
Long, white "cord", ventral surface of body
Contains large swellings of ganglia
Handles the majority of coordination w/o brain |
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Term
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Definition
In cardiac portion of stomach
Chitinous teeth that grind food into liquefied mush |
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