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All vertebrates share several key structures, including a backbone (vertebral column), a skull that protects the brain, a spinal cord for nervous system function, and a pair of limb bones for movement. Additionally, they have a closed circulatory system, a dorsal nerve cord, pharyngeal slits at some stage of development, and an endoskeleton made of cartilage or bone. Furthermore, all vertebrates exhibit bilateral symmetry and possess specialized organs for various functions.

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