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Vertebrates: Part II Reptiles & Birds
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Reptiles Dry body covering Scales made of keratin Heart has 3 chambers
Well-developed lungs Toes have claws
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Reptile Reproduction Amniote Egg developed Internal fertilization
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Homeostasis Modern reptiles = ectotherms
Dinosaurs may have been endotherms
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Special Senses Jacobson’s organ Visual range Heat-sensing pits
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Classes of Reptiles Rhynchocephalia Testudo Squamata Crocodilia
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Birds Body covered by feathers Endothermic Bones have air sacs
Toothless bill
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Bird Adaptations Feet differ by lifestyle Bill based on food type
Forelimbs = wings
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Feather Types Down Filoplumes Contour Flight
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Homeostasis Endotherms 4-chamber heart High metabolism Rapid heartbeat
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Other Systems Nervous: highly developed Excretory: reduced Digestive
Crop – stores food for later Gizzard – grinds food
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Bird Reproduction System Reduced Produce Amniote Egg
Internal Fertilization
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