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Vertebrates

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Sharks, rays, skates. Actinopterygii. Common fish. Lobe ... Nurse young with milk from mammary glands, provide parental care. Large brain. 4 chambered heart ... – PowerPoint PPT presentation

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Title: Vertebrates


1
Vertebrates
2
Characteristics of all vertebrates
  • Vertebrae bones or cartilage that surround the
    dorsal nerve cord and form the spine
  • Cranium protects the brain
  • Endoskeleton

3
9 Classes
  • Hagfish
  • Lampreys
  • Chondrichthyes
  • Sharks, rays, skates
  • Actinopterygii
  • Common fish
  • Lobe-finned fish
  • Amphibia
  • Reptilia
  • Aves
  • Birds
  • Mammalia

4
Characteristics of Fish
  • Fins are limbs adapted to steer body
  • Gills
  • Scaly skin
  • Cold blooded

5
Characteristics of Amphibians
  • Having Two Lives
  • Frogs, toads, salamanders
  • They undergo drastic changes during
    metamorphosis.
  • Smooth moist skin, no scales or claws, webbed
    feet

6
Characteristics of Amphibians
  • External fertilization
  • Must return to the water to mate and lay their
    eggs.
  • Respire through skin, gills and mouth cavities.
    Another reason they must stay moist.

7
Characteristics of Reptiles
  • Creeping
  • Examples turtles, tortoises, snakes, lizards,
    alligators, crocodiles
  • Skin with scales
  • Lungs
  • Internal fertilization
  • Claws on toes

8
Characteristics of Reptiles
  • Amniotic Eggshelled egg that can be laid in a
    dry location
  • No mucous glands

9
Characteristics of Birds
  • Feathers (except scales on hind legs)
  • Wings
  • Bones are hollow
  • Warm-blooded
  • Organ systems reduced (only 1 ovary in female)
  • No teeth
  • Amniotic egg

10
Characteristics of Mammals
  • Hair
  • Warm-blooded
  • Internal fertilization
  • Nurse young with milk from mammary glands,
    provide parental care
  • Large brain
  • 4 chambered heart
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