chordata an organism who has or had a notochord at least once in their life n.
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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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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)

slide2

FISH

Ectothermic – body temperature is controlled by the outside environment

Gills

Fins

Scales

slide3

FISH

  • Three classes:
      • JAWLESS FISH
        • Notochord (underdeveloped spine)
        • No jaws
        • Cartilage skeleton
        • Smooth slimy skin
        • Ex. Lamprey
slide4

FISH

  • CARTILAGINOUS
    • Has jaws
    • Cartilage skeleton
    • Denticles – sharp tiny scales that can be found on any

cartilaginous fish.

    • Oily liver

(helps to stay afloat)

slide5

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
slide6

AMPHIBIANS

  • Ectothermic
  • Smooth moist skin
  • Double life

METAMORPHOSIS – When an organism goes through a series of stages dramatically changing how it looks.

slide7

AMPHIBIANS

  • Three types
    • CAECILIANS
      • No legs
      • Looks like a worm or

a snake

      • Some are blind
      • Some have bony

scales

slide8

AMPHIBIANS

  • SALAMANDERS
    • Tail
    • Four strong legs
    • Found under logs

or in damp woods

slide9

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
slide10

REPTILES

  • ECTOTHERMIC
  • AMNIOTIC EGG
    • A hard shell holding young that provides nutrients and allows reptiles to live on land
  • DRY SCALY SKIN
slide11

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
slide12

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

slide13

REPTILES

  • LIZARDS
    • 4 legs
    • Carnivores
    • Warm habitat
slide14

REPTILES

  • SNAKES
    • Deserts to swamps
    • No legs, no eyelids, no ears
    • One lung
    • Jaw can separate
slide15

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
slide16

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
slide17

AVES (birds)

  • FLIGHTLESS
    • Penguin (flippers)
    • Ostrich – can reach 40 mph
slide18

AVES (birds)

  • WATER
    • Webbed feet
    • Ducks, geese
slide19

AVES (birds)

  • BIRDS OF PREY
    • Sharp claws
    • Pointed sharp beaks
    • Meat eaters

Hawk, Eagle, Owl

slide20

AVES (birds)

  • PERCHING
    • Robins, Blue Jays, etc
    • Claws for clamping onto

branches

      • Prevents from falling off
slide21

MAMMALS

  • ENDOTHERMIC
  • FUR OR HAIR
  • MAMMARY GLANDS
    • Glands that produce milk for the young
slide22

MAMMALS

  • MONOTREMES
    • Lays leather shelled eggs
    • Licks milk from skin
    • Platypus and Echidna
slide23

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

slide24

MAMMALS

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