The different types of vertebrae
The spine extends from the head to the sacrum, and in most people consists of 24 vertebrae. The vertebral column can be divided into three segments:
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The anatomy of a vertebra
Each vertebra has several parts. The most important are:
Primate vertebral numbers
Between the skull and the sacrum, humans have 24 vertebrae. Well, most humans, anyway. Sometimes humans have a few more or less.