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Module 16 Crossword

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Across
2
An aquatic mammal
5
"3rd eye" in tuaturas
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Outer membrane of the egg
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Class that has hair covering their bodies
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Order containing turtles
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Structure that allows embryo to be nourished by mother's blood supply
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Sac containing blood vessels in an egg
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Number of heart chambers in a reptile
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Lacking an internal mechanism to control heat
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Order containing kangaroos
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Class containing snakes, turtles, lizards
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Venom that attacks nervous system
Down
1
Hairs on their feet create Van der Walls forces
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Protects the egg from bacteria through chemicals
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Feather that has no hooked barbules
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Have the ability to walk on two legs
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Type of egg that retains water
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Membrane that grows around developing embryo
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Specialized scales on the bellies of snakes
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Has an internal mechanism to control heat
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Organs used by snakes to pick up chemicals in the air
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Venom that attacks blood
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Method used by birds to releases oil over their feathers
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Structure on bird wing that helps bird land
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Clump of nutrients for developing embryo