Vertebrata - Vertebrates |
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All vertebrates have a vertebral column. The vertebral column, or backbone, surrounds and protects the nerve cord. Vertebrates also have a well-developed brain, a pair of eyes, a circulatory system with a heart, a pharynx, and a mouth with muscles! Humans, birds, mammals, reptiles, amphibians, and fish are all vertebrates. There are seven living classes of vertebrates.
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