Which part of the vertebral column is considered a vestigial tail?

7 fused sacral vertebrae

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5 fused sacral vertebrae

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5 fused coccygeal vertebrae

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4 fused coccygeal vertebrae

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Solution

The correct option is D 4 fused coccygeal vertebrae
The vertebral column is divided into five regions which includes, cervical, thoracic, lumbar, sacrum and coccyx. Bones of cervical, thoracic and lumbar vertebrae do not fuse. Five sacral vertebrae are fused forming the sacrum and 4 coccygeal vertebrae fuse to form vestigial tail.

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C, T, L, S, and Co represent the cervical, thoracic, lumbar, sacral, and coccygeal vertebrae.

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Which one of the following is showing the correct sequential order of vertebrae in the vertebral column of human beings?

(a) Cervical - lumbar - thoracis - sacral - coccygeal

(b) Cervical - thoracis - sacral - lumbar - coccygeal

(d) Cervical - thoracic - lumbar - sacral - coccygeal

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