17. Name the different parts of the human
skeleton. Why are the bones in the cranium
fused but those in the vertebral column
separated by cartilage?
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The vertebral arch is posterior, meaning it faces the back of a person. Together, these enclose the vertebral foramen, which contains the spinal cord. Because the spinal cord ends in the lumbar spine, and the sacrum and coccyx are fused, they do not contain a central foramen.
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