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Reptilia – “creepy crawly”

Reptilia – “creepy crawly” . Examples: snakes, lizards, crocodiles, turtles. Traits. Dry, scaly skin. Traits. ectotherms. Traits. Well developed lungs. Traits. 3 chambered heart with partially divided ventricle. Traits. Muscular bony legs to the sides, if any at all. Traits.

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Reptilia – “creepy crawly”

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  1. Reptilia – “creepy crawly” • Examples: snakes, lizards, crocodiles, turtles

  2. Traits • Dry, scaly skin

  3. Traits • ectotherms

  4. Traits • Well developed lungs

  5. Traits • 3 chambered heart with partially divided ventricle

  6. Traits • Muscular bony legs to the sides, if any at all

  7. Traits • Toes with claws

  8. Traits • Internal fertilization

  9. Traits • Lay amniotic eggs on land Amphibian egg Reptile egg

  10. Reptilian heart • Good pressure, partially divided ventricle keeps blood from mixing as much

  11. Reptilian adaptations for land life • To avoid dehydration – waterproof skin, colon absorbs water from feces, low respiration rate loses less water • Reproduction – internal fertilization, amniotic egg

  12. Copulation • Process of internal fertilization, male inserts sperm into the female system

  13. Amniotic egg • Overcame the last obstacle to life on land

  14. Amnion • provides a water environment for the developing embryo embryo amnion

  15. Albumen • Provides protein for building materials (white) albumen embryo

  16. Yolk sac • Provides food energy yolk sac embryo

  17. Shell and Chorion • Protects and waterproofs shell chorion embryo

  18. Allantois • Collects wastes, acts as a respiratory surface allantoise embryo

  19. Orders of Reptiles Squamata Testudinata Crocodilia Rhynchocephalia

  20. Squamata • Largest order of reptiles • E.g. – snakes and lizards

  21. Testudinata • Turtles and tortoises How do you tell them apart?

  22. Turtles • live mostly in water, flatter shell, fast

  23. Tortoises • live on land, rounded shell, slow

  24. Turtle or Tortoise?

  25. Turtle or Tortoise?

  26. Crocodilia • Crocodilesand alligators

  27. Crocodiles • narrow head • pointed snout • teeth visible on top • and bottom Alligators • broad head • rounded snout • teeth not as visible on bottom

  28. Alligator or Crocodile?

  29. Alligator or Crocodile?

  30. Alligator or Crocodile?

  31. Alligator or Crocodile?

  32. Rhynchocephalia • Tuatara 3 rows of teeth (2 on top and 1 on bottom) and a light sensitive gland on its forehead that looks like a third eye

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