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Module 16 Crossword

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