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REPTILES

REPTILES. Ch. 31 Pg. 757-765. CHARACTERISTICS. First to live completely on land. CHARACTERISTICS. First to live completely on land Eggs covered in shell (don’t dry out). CHARACTERISTICS. First to live completely on land Eggs covered in shell (don’t dry out)

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REPTILES

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  1. REPTILES Ch. 31 Pg. 757-765

  2. CHARACTERISTICS • First to live completely on land

  3. CHARACTERISTICS • First to live completely on land • Eggs covered in shell (don’t dry out)

  4. CHARACTERISTICS • First to live completely on land • Eggs covered in shell (don’t dry out) • Skin covered in scales (don’t dry out)

  5. CHARACTERISTICS • First to live completely on land • Eggs covered in shell (don’t dry out) • Skin covered in scales (don’t dry out) • Dominated land (especially JURASSIC PERIOD)

  6. CHARACTERISTICS • First to live completely on land • Eggs covered in shell (don’t dry out) • Skin covered in scales (don’t dry out) • Dominated land (especially JURASIC PERIOD) • Live in deserts, tropical areas, oceans, rivers, lakes—but NOT in very cold regions

  7. CHARACTERISTICS • Ectothermic, scales, clawed toes, lack feathers

  8. CHARACTERISTICS • Ectothermic, scales, clawed toes, lack feathers • Well developed lungs, heart with PARTIALLY divided ventricle

  9. CHARACTERISTICS • Ectothermic, scales, clawed toes, lack feathers • Well developed lungs, heart with PARTIALLY divided ventricle • Internal fertilization/amniotic eggs

  10. MOVEMENT/RESPONSE • Legs positioned under body but not DIRECTLY under (slower than mammals)

  11. MOVEMENT/RESPONSE • Legs positioned under body but not DIRECTLY under (slower than mammals) • Developed vision • Moveable eyelids • Some see at night (geckos)

  12. MOVEMENT/RESPONSE • Legs positioned under body but not DIRECTLY under (slower than mammals) • Developed vision • Moveable eyelids • Some see at night (geckos) • TYMPANUM (external ear) • NOT snakes-use tongue-smell and vibrations (JACOBSON’S ORGAN)

  13. MOVEMENT/RESPONSE • Legs positioned under body but not DIRECTLY under (slower than mammals) • Developed vision • Moveable eyelids • Some see at night (geckos) • TYMPANUM (external ear) • NOT snakes-use tongue-smell and vibrations (JACOBSON’S ORGAN) • Some snakes have ‘pits’ that sense heat (vipers)

  14. MOVEMENT/RESPONSE • Legs positioned under body but not DIRECTLY under (slower than mammals) • Developed vision • Moveable eyelids • Some see at night (geckos) • TYMPANUM (external ear) • NOT snakes-use tongue-smell and vibrations (JACOBSON’S ORGAN) • Some snakes have ‘pits’ that sense heat (vipers) • Some with 4 legs, some with none

  15. MOVEMENT AND RESPONSE • ECTOTHERMIC-cold blooded

  16. MOVEMENT AND RESPONSE • ECTOTHERMIC-cold blooded • Bask in sun to warm up

  17. MOVEMENT AND RESPONSE • ECTOTHERMIC-cold blooded • Bask in sun to warm up • Head to shade to cool off

  18. MOVEMENT AND RESPONSE • ECTOTHERMIC-cold blooded • Bask in sun to warm up • Head to shade to cool off • Most reptiles do not live in cold climates

  19. MOVEMENT AND RESPONSE • ECTOTHERMIC-cold blooded • Bask in sun to warm up • Head to shade to cool off • Most reptiles do not live in cold climates • Not active during cold

  20. RESPIRATION AND CIRCULATION • LUNGS • Many internal folds (increase surface area)

  21. RESPIRATION AND CIRCULATION • LUNGS • Many internal folds (increase surface area) • Muscles in rib cage move air

  22. RESPIRATION AND CIRCULATION • LUNGS • Many internal folds (increase surface area) • Muscles in rib cage move air • HEART • Septum partly divides ventricle-less mixing of oxygen rich with oxygen poor blood

  23. REPRODUCTION • Internal fertilization

  24. REPRODUCTION • Internal fertilization • OVIPAROUS-young hatch from eggs outside of moms body (MOST reptiles)

  25. REPRODUCTION • Internal fertilization • OVIPAROUS-young hatch from eggs outside of moms body (MOST reptiles) • OVOVIVIPAROUS-eggs hatch inside mother (some snakes/lizards)

  26. REPRODUCTION • Internal fertilization • OVIPAROUS-young hatch from eggs outside of moms body (MOST reptiles) • OVOVIVIPAROUS-eggs hatch inside mother (some snakes/lizards) • AMNIOTIC EGG-contains both a water supply and a food supply

  27. REPRODUCTION • Internal fertilization • OVIPAROUS-young hatch from eggs outside of moms body (MOST reptiles) • OVOVIVIPAROUS-eggs hatch inside mother (some snakes/lizards) • AMNIOTIC EGG-contains both a water supply and a food supply • Shell keeps watertight

  28. REPRODUCTION • ALBUMEN-egg white-cushion/nutrients

  29. REPRODUCTION • ALBUMEN-egg white-cushion/nutrients • AMNION-cushions embryo

  30. REPRODUCTION • ALBUMEN-egg white-cushion/nutrients • AMNION-cushions embryo • YOLK SAC-main food supply

  31. REPRODUCTION • ALBUMEN-egg white-cushion/nutrients • AMNION-cushions embryo • YOLK SAC-main food supply • ALANTOIS-stores waste/gas exchange

  32. REPRODUCTION • ALBUMEN-egg white-cushion/nutrients • AMNION-cushions embryo • YOLK SAC-main food supply • ALANTOIS-stores waste/gas exchange • CHORION-allows oxygen to enter and carbon dioxide to leave

  33. REPRODUCTION • ALBUMEN-egg white-cushion/nutrients

  34. REPRODUCTION • ALBUMEN-egg white-cushion/nutrients • AMNION-cushions embryo

  35. REPRODUCTION • ALBUMEN-egg white-cushion/nutrients • AMNION-cushions embryo • YOLK SAC-main food supply

  36. REPRODUCTION • ALBUMEN-egg white-cushion/nutrients • AMNION-cushions embryo • YOLK SAC-main food supply • ALLANTOIS-stores waste/gas exchange

  37. REPRODUCTION • ALBUMEN-egg white-cushion/nutrients • AMNION-cushions embryo • YOLK SAC-main food supply • ALLANTOIS-stores waste/gas exchange • CHORION-allows oxygen to enter and carbon dioxide to leave

  38. GROUPS OF REPTILES • TURTLES AND TORTOISES • Shell covers body

  39. GROUPS OF REPTILES • TURTLES AND TORTOISES • Shell covers body • Spine fused to top of shell

  40. GROUPS OF REPTILES • TURTLES AND TORTOISES • Shell covers body • Spine fused to top of shell • Most can pull head and legs in to shell for protection

  41. GROUPS OF REPTILES • TURTLES AND TORTOISES • Shell covers body • Spine fused to top of shell • Most can pull head and legs in to shell for protection • TORTOISES- • Live on land

  42. GROUPS OF REPTILES • TURTLES AND TORTOISES • Shell covers body • Spine fused to top of shell • Most can pull head and legs in to shell for protection • TORTOISES- • Live on land • Most have a dome-shaped shell

  43. GROUPS OF REPTILES • TURTLES AND TORTOISES • Shell covers body • Spine fused to top of shell • Most can pull head and legs in to shell for protection • TORTOISES- • Live on land • Most have a dome-shaped shell • TURTLES- • Most live in water

  44. GROUPS OF REPTILES • TURTLES AND TORTOISES • Shell covers body • Spine fused to top of shell • Most can pull head and legs in to shell for protection • TORTOISES- • Live on land • Most have a dome-shaped shell • TURTLES- • Most live in water • Streamlined shell

  45. TURTLES/TORTOISES • Shell made of 2 parts

  46. TURTLES/TORTOISES • Shell made of 2 parts • Carapace-top of shell

  47. TURTLES/TORTOISES • Shell made of 2 parts • Carapace-top of shell • Plastron-bottom of shell

  48. TURTLES/TORTOISES • Shell made of 2 parts • Carapace-top of shell • Plastron-bottom of shell • Lack teeth but have sharp plates on jaws

  49. TURTLES/TORTOISES • Shell made of 2 parts • Carapace-top of shell • Plastron-bottom of shell • Lack teeth but have sharp plates on jaws • Many are herbivores-snapping turtle=carnivore

  50. TURTLES/TORTOISES • Shell made of 2 parts • Carapace-top of shell • Plastron-bottom of shell • Lack teeth but have sharp plates on jaws • Many are herbivores-snapping turtle=carnivore • Lay eggs in ground

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