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CHORDATA (an organism who has or had a notochord at least once in their life)

VERTEBRATES. CHORDATA (an organism who has or had a notochord at least once in their life). FISH. Ectothermic – body temperature is controlled by the outside environment Gills Fins Scales. FISH. Three classes: JAWLESS FISH Notochord (underdeveloped spine) No jaws

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CHORDATA (an organism who has or had a notochord at least once in their life)

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  1. VERTEBRATES CHORDATA (an organism who has or had a notochord at least once in their life)

  2. FISH Ectothermic – body temperature is controlled by the outside environment Gills Fins Scales

  3. FISH • Three classes: • JAWLESS FISH • Notochord (underdeveloped spine) • No jaws • Cartilage skeleton • Smooth slimy skin • Ex. Lamprey

  4. FISH • CARTILAGINOUS • Has jaws • Cartilage skeleton • Denticles – sharp tiny scales that can be found on any cartilaginous fish. • Oily liver (helps to stay afloat)

  5. FISH • BONY FISH • Bones for a skeleton • Swim bladder – an organ in a bony fish that controls buoyancy • Lateral line – a sense organ that picks up on vibrations and pressure in the water and helps a fish with balance and navigation. • Ray finned

  6. AMPHIBIANS • Ectothermic • Smooth moist skin • Double life METAMORPHOSIS – When an organism goes through a series of stages dramatically changing how it looks.

  7. AMPHIBIANS • Three types • CAECILIANS • No legs • Looks like a worm or a snake • Some are blind • Some have bony scales

  8. AMPHIBIANS • SALAMANDERS • Tail • Four strong legs • Found under logs or in damp woods

  9. AMPHIBIANS • FROGS AND TOADS • Both have sticky tongue attached at the front of the mouth • Frogs • Smooth moist skin • Jump and spend more time in the water • Toads • Drier bumpier skin • walk

  10. REPTILES • ECTOTHERMIC • AMNIOTIC EGG • A hard shell holding young that provides nutrients and allows reptiles to live on land • DRY SCALY SKIN

  11. REPTILES • TURTLES and TORTISES • Turtles live in water some of the time (flippers or webbed feet) • Tortises live on land and have claws • Both have a shell that is the backbone

  12. REPTILES • CROCODILES and ALLIGATORS • Carnivores • Eyes and nostrils on top of head • Care for eggs and young • Crocks – narrow pointed snout • Alligators – broad rounded snout

  13. REPTILES • LIZARDS • 4 legs • Carnivores • Warm habitat

  14. REPTILES • SNAKES • Deserts to swamps • No legs, no eyelids, no ears • One lung • Jaw can separate

  15. REPTILES • TUATARA • Ancient – hasn’t changed much in 225 million years – called a living fossil • Like cooler weather, live in New Zealand • Not lizards • Special teeth arrangement (one bottom row fits into two rows on the top) • Mate differently than lizards • Gland beneath skin on head that is a third eye • Used to get UV rays during first few months of life, then it covers with scales

  16. AVES (birds) • ENDOTHERMIC – body temperature is controlled and regulated within the body • HOLLOW BONES • AMNIOTIC EGG • FEATHERS • Contour feathers – outer layer that helps with flight and protects down feathers (water resistant with oil) • Down feathers – under contour feathers that are used for insulation

  17. AVES (birds) • FLIGHTLESS • Penguin (flippers) • Ostrich – can reach 40 mph

  18. AVES (birds) • WATER • Webbed feet • Ducks, geese

  19. AVES (birds) • BIRDS OF PREY • Sharp claws • Pointed sharp beaks • Meat eaters Hawk, Eagle, Owl

  20. AVES (birds) • PERCHING • Robins, Blue Jays, etc • Claws for clamping onto branches • Prevents from falling off

  21. MAMMALS • ENDOTHERMIC • FUR OR HAIR • MAMMARY GLANDS • Glands that produce milk for the young

  22. MAMMALS • MONOTREMES • Lays leather shelled eggs • Licks milk from skin • Platypus and Echidna

  23. MAMMALS • MARSUPIALS OPOSSUM • Pouch • Babies are born twice, into the pouch after a few weeks very underdeveloped and then out of the pouch after several months Kangaroo Koala Wombat

  24. MAMMALS • PLACENTAL • Embryo develops in the uterus of the mother • Placenta provides nutrients

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