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9 Cards in this Set

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  • Back
Birds.
Amniotic eggs & scales on legs like reptiles.
Class Aves
Link between reptiles & birds.
Archaeopteryx
Hollow bones, strong honeycomb structure.
ToothlessL gizzard helps with physical digestion.
High metabolic rate/large energy demand- 4-chambered heart.
Acute senses, especially vision.
Large brains.
Wings & feathers: strong, flexible, light.
Enhanced sternum (breastbone) for wing muscle attachment.
Bird anatomy enhances flight
Frigate bird
2m wingspand & entire skeleton weighs only 113g!
Ratites
Flightless birds, don’t have keel.
Class Mammalia
Hair, mammary glands, teeth differentiation.
Endothermic, active metabolism.

Surface-volume ratios important to metabolic rate.
Monotremes
Egglaying mammals

Spiny Echidna
Platypus
Marsupials
Mammals with pouch.

Koala.
Opossums.
Eutherians
Placental mammals

Dogs, whales.