1 / 40

Reptiles

Reptiles. Class Reptilia Snakes, lizards, turtles, tortoises, crocodiles, alligators Amniotic egg…leathery shell protects water environment inside Dry, scaly skin prevents water loss. Reptiles. Circulation (2 closed systems … pulmonary and systemic)

ora
Download Presentation

Reptiles

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Reptiles • Class Reptilia • Snakes, lizards, turtles, tortoises, crocodiles, alligators • Amniotic egg…leathery shell protects water environment inside • Dry, scaly skin prevents water loss

  2. Reptiles • Circulation (2 closed systems … pulmonary and systemic) • Heart 3 chambers in snakes and turtles (septum divides ventricles and minimizes blood mixing) • Heart 4 chambers in crocodiles

  3. Reptiles • Respiration… lungs divided into lobes…many small sacs (alveoli) greater surface area for respiration. • Brain very well developed, especially cerebrum (front area, controls movement)

  4. Reptiles • Thermoregulation • Ectothermic…absorb heat from surrounding, so body temp. is close to surroundings (used to be called cold blooded) • Amphibians and fish are ectotherms, too.

  5. Reptiles • Reproduction: • Most oviparous…lay eggs that develop on their own • Some ovoviviparous…keep egg in body to develop and lay close to time of birth • Few viviparous…live birth

  6. Reptiles • Class: Chelonia: • Turtles and tortoises • Class Squamata: • Lizards and snakes • Class Rynchocephalia: • Tuatara • Class Crocodilia • Crocodiles, alligators, caimans

  7. Class: Chelonia:Turtles and tortoises

  8. Class Squamata:Lizards and snakes

  9. Class Rynchocephalia:Tuatara

  10. Class CrocodiliaCrocodiles, alligators, caimans

  11. Birds • Class Aves • Evolved about 150 million years ago • Forelimbs modified to wings • Lightweight skeleton (hollow/fused bones) • Closed circulatory system with 4 chambered heart…no mixing of oxygenated/deoxygenated blood…higher metabolism/movement • Large, well developed brain

  12. Birds • Endothermic (temp 104 – 106 oF) • Lungs and air sacs • Oviparous (lay eggs) • Feathers (and skin) cover body • Flight, down, contour feathers • Digestive organs include: crop, 2 stomachs (#2…gizzard has stones in it)

  13. Order AnseriformesSwans, ducks, geese

  14. Order Sterigiformesowls

  15. Order Apodiformeshummingbirds

  16. Order PsittaciformesParrots, parakeets, macaws, cockatiels, cockatoos

  17. Order PiciformesWoodpeckers, toucans

  18. Order PasseriformesMost familiar….robins, wrens, cardinals

  19. Order ColumbiformesPigeons, doves

  20. Order CiconiiformesHerons, storks, ibises, egrets, penguins

  21. Order GalliformesTurkeys, pheasants, chickens

  22. Order StruthioniformesOstrich, emu, rhea

  23. Mammals • Class Mammalia • Evolved 300 million years ago • Hair (and skin) body covering • Endothermic • 4 chambered heart (closed circulatory system) • Females produce milk for young

  24. Mammals • Specialized teeth for different jobs • Lungs with alveoli (small sacs like reptiles) • Diaphragm (muscle below ribcage) helps breathe • Brain about 15 times heavier than same sized fish, amphibian or reptile!

  25. Mammals • 3 groups of mammals • Monotremes: Oviparous (lay eggs), e.g. duck-billed platypus • Marsupials: viviparous (young born immature, develop inside mother for some time), e.g. opposum, kangaroo • Placental: viviparous (young fed in uterus by placenta), most mammals you think of

  26. Order Xenarthra • Anteaters, armadillos, sloths • 30 spp

  27. Order Lagomorpha • Rabbits, hares, pika • 70 spp

  28. Order Rodentia • Mice, squirrels, chipmunks, rats • Largest Order, over 1800 spp

  29. Order Primata • Monkeys, gibbons, apes, humans • 235 spp

  30. Order Chiroptera • Bats • 900 spp

  31. Order Insectivora • Shrew, hedgehogs, moles • 390 spp

  32. Order Carnivora • Dogs, cats, bears, sea lions, otters, seals, hyenas • 274 spp

  33. Order Artiodactyla • Deer, cattle, giraffe, pig, camel • Even # toes on hoof • 210 spp

  34. Order Perissodactyla • odd # toes on hoof • Horse, rhino, zebra • 17 spp

  35. Order Cetacea • Whale, dolphin, porpoise • 90 spp

  36. Order Sirenia • Manatee, duogong • 4 spp

  37. Order Proboscidea • African and Asian elephants • 2 spp

  38. Order Montremata • Lay eggs • Platypus, echidna • 3 spp

  39. Order Marsupiala • Have pouches • 280 spp • Opposum, kangaroo, koala bear

More Related