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Animals with bony spinal columns or backbones, a spinal cord, and a skull enclosing the brain and eyes.
Animals with bony spinal columns or backbones, a spinal cord and a skull enclosing the brain and eyes. They include fish, birds, amphibians, reptiles and mammals. Though vertebrates include some of our most familiar animals, they account for only about 1 in 20 of all species on Earth.
They include fish, birds, amphibians, reptiles and mammals. Though vertebrates include some of our most familiar animals, they account for only about 1 in 20 of all species on Earth.