Why do you think a human skeleton has a tailbone when humans do not have tails?

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The tailbone, or coccyx, functions in much the same way that a differential functions in one’s automobile. It is sort of a centralized fusion of moving parts that facilitate operation of those parts as a whole. Constituted primarily of the last several vertebrae, it is the location at which bones...

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The tailbone, or coccyx, functions in much the same way that a differential functions in one’s automobile. It is sort of a centralized fusion of moving parts that facilitate operation of those parts as a whole. Constituted primarily of the last several vertebrae, it is the location at which bones central to human movement are connected with ligaments and other tissue. It is called a tailbone because it exists at the lowest part of the back and constitutes the end of the vertebral column. As such, it is referred to as the “tailbone” even though humans do not have tails.

Now, that brief description aside, the existence in humans of the coccyx is often pointed to as physical evidence that human beings evolved from other forms of life, mainly from apes, which do not have tails but which are considered part of the evolutionary process that culminated in humans and that was preceded by other primates that did or do have tails. Humans do not have tails despite the presence of something labeled a “tailbone” because, according to evolutionary theory or science humans do not have a need for a tail, balance being factored into our evolutionary makeup, as in our ability to walk on two legs, our arms being available for purposes other than simple movement from one spot to another.

There are individuals who believe that the tailbone is not a necessary part of the human anatomy. That is true, but it certainly makes movement a lot easier, as obvious when one damages one’s tailbone or lower vertebrae.

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