1. ANIMAL CLASSIFICATION.


             UNIT 2: ANIMALS

          1. ANIMAL CLASSIFICATION.
         
          - We can divide the animals into two groups: vertebrates and invertebrates.
          
          - Vertebrates: are animals that have skeleton (bones or spine).

          - Invertebrates: are animals that don't have skeleton (spine or bones).

          - What is the skeleton? It's the group of bones.

          - What is the skeleton for? To move, hold and protect the body.


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