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subphylum of chorded animals, comprising agates, fish, amphibians, reptiles, birds and mammals, characterized by the presence of a segmented spine and core that protects the brain.
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Resposta:
The body of vertebrate animals stands out for the presence of the spinal cord, the spine, the central nervous system, the internal skeleton, the muscular system and two layers of skin, called the dermis (internal) and epidermis
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