How many vertebrae comprise the sacrum and coccyx, respectively?

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Multiple Choice

How many vertebrae comprise the sacrum and coccyx, respectively?

Explanation:
The number reflects how the tail region of the spine is organized in adults. The sacrum is formed by the fusion of five vertebrae, creating a single triangular bone at the base of the spine. The coccyx, or tailbone, is typically formed from four coccygeal vertebrae that fuse together, though there can be variation (sometimes three or five), with four being most common. So the standard counts are five for the sacrum and four for the coccyx.

The number reflects how the tail region of the spine is organized in adults. The sacrum is formed by the fusion of five vertebrae, creating a single triangular bone at the base of the spine. The coccyx, or tailbone, is typically formed from four coccygeal vertebrae that fuse together, though there can be variation (sometimes three or five), with four being most common. So the standard counts are five for the sacrum and four for the coccyx.

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