2 Metaphors for vertebras

The shapes of beasts and birds, of reptiles and fishes, vary in every conceivable degree; yet a single vertebra is the pattern and representation of the framework of them all, from eels to elephants.

On the upper surface of the axis, the second vertebra, is a peg or process, called the odontoid process from its resemblance to a tooth.

2 Metaphors for  vertebras