Anatomy: Animals Inside

Skeletal System

How many vertebrae are in the necks of various mammals?

Not all mammal neck vertebrae (cervical vertebrae) are created equal. Although most mammals have only seven neck bones, the manatee and the two-toed sloth have only six neck bones; a giraffe’s long neck has seven neck bones, the same as many other mammals, but the vertebrae are greatly elongated; the ant bear has eight neck bones, and the three-toed sloth has nine neck bones.


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