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Vertebrates - Coggle Diagram

- - - - )
- - - - A backbone. Stacked vertebrae make up an internal skeletal framework to support the animal and enclose the nerve cord.
    - - Mammal, (class Mammalia), any member of the group of vertebrate animals in which the young are nourished with milk from special mammary glands of the mother.
- - - - Frogs, salamanders, and caecilians all supplement the use of lungs by respiring directly across their skin, which is kept moist and provides an extensive surface area. This mode of respiration is only efficient for a high surface-to-volume ratio in an animal.
- - - - Turtles and Tortoises ,Lizards and Snakes and
        Crocodiles and Alligators.