Crayfish Crossword Puzzle
Download and print this Crayfish crossword puzzle. Use a pencil or pen to complete the puzzle by filling in the blanks. The completed answers are included, so you can easily check your progress.
PDF will include puzzle sheet and the answer key.
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QUESTIONS LIST:
- green glands : crayfish kidneys, excrete waste throughout the body
- circulatory : open system, lacks any arteries or veins, blood is pumped into the hemocoel
- gills : large, feathery structures used for gas exchange, connected to the base of the walking legs
- swimmerets : aid in movement, located in the abdomen, used to determine the sex of the crayfish
- cephalothorax : "head" region, anterior of the abdomen, contains 13 body segments
- abdomen : second body section, has 6 segments, contains the swimmerets
- photophore : light-producing organ in certain bio-luminescent animals
- telson : middle of the uropods, bears the anus, long in horseshoe crabs
- krill : shrimplike creatures, filter feeders, mostly bioluminescent
- mandible : true jaws, located beneath the antennae
- decapods : crab, lobster, and true shrimp belong in this group
- exoskeleton : made of protein and chitin, protective layer
- cirriped : feathery appendages, extends into water when shell opens
- coea : larval stage in crabs and shrimp
- palp : chelicerae used to capture prey, sensory structures
- ovarian duct : crescent-shaped slit at the base of the third walking legs in female crayfish
- chitin : complex carbohydrate, makes up the exoskeleton
- carapace : shield of chitin, part of exoskeleton that covers the cephalothorax
- molt : process in which animal sheds its old exoskeleton
- coconut : type of crab, largest terrestrial arthropod, named after the hard-shelled fruit it eats
