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7th Grade Crossword

Horizontales
Flexible tissue
Upper chamber of heart
Covering of an aperture
Extreme dryness
Opening or widening of a structure
Specific living environment
Gas filled sac in fishes
2nd part to 14 across
Fibers in gills
2nd part to 18 across
Bone at the base of the spine
Directly across from
An animal that migrates is
Opening at the bottom of heart
Thin layer of tissue
Sticky in texture
Vertebrate with fins
Verticales
Branching blood vessels
Opening at the top of the heart that brings blood in
Ectothermic vertebrate, early life is spent in water
Larva of frog
Help attach the jaws with the skull
Top of the mouth
Threadlike structure
Lower jawbones
A type of fishing with a fake insect as bait
2nd part to 5 down
Membrane that allows us to hear
Shrinking or collapsing of a structure
Fine branching filaments
Exchanges oxygen and carbon dioxide in the chest
Main artery in an animal