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Presentación marta moreno

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  • 1. VERTEBRATES CHARACTERISTICS AND GROUPS
  • 2. MAIN CHARACTERISTICS• They have got a spinal column or a internal esqueleton.• Their bodies are divided : head ,trunk and extremities.• Their nervous system and sense organs are very well developed .
  • 3. GROUPS• Fish• Amphibians• Mammals• Birds• Reptile
  • 4. FISH• Body covered with scales.• Breathe with gills• They use their fins to swim.
  • 5. AMPHIBIANS• Young are aquatic animals with gills.• Have got smooth skin and lungs to breathe air when they become adults.• Also cutaneous respiration.• Oviparous animals.• Most are carnivores.• Main groups : Frogs and toads – salamanders and newts.
  • 6. REPTILES• Have got hard scales and lungs to breathe air.• By crawling on four legs .• Snake are different because they haven´t got legs .
  • 7. BIRDS• Birds have got feathers .Have got four extremities.Two wings and two wings.• All birds have got lungs.
  • 8. MAMMALS• Have usually got some hair .• Have got lots of thick hair called fur.• Are oviparous• Are three groups..monotremes,marsupials and placental mammals.