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By: Blake Iddings & Maggie Bedillion

By: Blake Iddings & Maggie Bedillion. Characteristics. Amniotic Egg: made reptiles fully independent from water Chorion : outer membrane below egg shell; allows gas exchange but keeps water in Amnion: encases developing embryo within fluid-filled cavity

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By: Blake Iddings & Maggie Bedillion

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  1. By: Blake Iddings & Maggie Bedillion

  2. Characteristics • Amniotic Egg: made reptiles fully independent from water • Chorion: outer membrane below egg shell; allows gas exchange but keeps water in • Amnion: encases developing embryo within fluid-filled cavity • Yolk Sac: provides food for embryo through blood vessels • Allantois: encases cavity for waste products • Fertilization: must be internal • Dry Skin: watertight, layers of scales that develop from epidermal cells with keratin (protein) • Thoracic Breathing: movement of rib cage • Vertebrate

  3. Reproduction • Reptiles reproduce by laying eggs • Some give birth to live young that hatch from the eggs inside the mother’s body • Most reptiles reproduce amniotic eggs • Which are able to survive outside of water • These eggs have complex membrane systems • Protective shells that are permeable to oxygen and other gases

  4. Feeding/Digestion • Complete digestive tract • Organs include: • Mouth • Pharynx • Esophagus • Stomach • Intestines • Liver • Pancreas • Anus • http://kids.nationalgeographic.com/Animals/CreatureFeature/American-alligator

  5. Diversity Able to complete life cycle Diversified throughout land and ecosystems -including driest deserts

  6. Body support • Water tight skin enriched with protein called keratin • Keratin prevents dehydration • Skull • Backbone • Hinged jaw

  7. Examples of reptiles • Turtles • Lizards • Snakes • Crocodiles • alligators

  8. Flying Reptiles http://channel.nationalgeographic.com/channel/videos/player.html?title=6037

  9. Works cited • http://channel.nationalgeographic.com/channel/videos/player.html?title=6037 • http://kids.nationalgeographic.com/Animals/CreatureFeature/American-alligator

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