Animal Classification

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Animal Classification

• Before Chapter 1

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Animals are divided into two groups.

1. Vertebrates
2. Invertebrates

Invertebrates are animals without a back bone.
Vertebrates are animals with a backbone.
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Vertebrates Are Divided Into 5 Different Classes

• Mammals
• Fish
• Amphibians
• Reptiles
• Birds

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Mammals

• They make milk for their babies and take good
  care of their young.
• They have at least some hair.
• No mammal has more than four limbs.
• All mammals are warmblooded.
• All mammals have lungs and breathe air.

5
Fish

• All fish have gills.
• All fish have fins.
• Fish are coldblooded.

6
Amphibians

• All amphibians breathe with gills in water when
  they are born, and some breathe with lungs on
  land later.
• All amphibians have smooth, moist skin.
• All amphibians lay eggs.
• All amphibians are coldblooded.

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Reptiles

• All reptiles breathe with lungs.
• All reptiles are covered with dry scales.
• All reptiles are coldblooded.

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Birds

• All birds have feathers.
• All birds have wings.
• All birds have two legs.
• All birds breathe with lungs.
• All birds have bills or beaks.

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INVERTEBRATES
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Invertebrates

• Have no backbone.
• Usually have weak muscles.
• Usually are small animals with soft bodies.
• If they do have skeletons, the skeletons are on
  the outside of their bodies for strength and
  protection.
• Are coldblooded.