Vertebral Column Structure and Functions

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The thoracic vertebrae are the smallest and most flexible, while the lumbar vertebrae are the largest and strongest.
The lumbar vertebrae are the largest and strongest, providing support for the lower back, while the cervical vertebrae are the smallest and most flexible, providing support for the head and neck. (correct)
The lumbar vertebrae are the most flexible, allowing for a wide range of motion, while the cervical vertebrae are the smallest and most delicate.
The cervical vertebrae are the largest and strongest, followed by the thoracic, and then the lumbar.

Small bones forming the backbone in vertebrate animals, arranged in a column.

Main functions include protection, support, and flexibility of the spine.

Cushions between vertebrae allowing flexibility and movement of the spine.

The upper 7 vertebrae in the neck region of the spine.

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The 5 lower vertebrae in the lower back region, crucial for support.

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A human vertebral column typically has 33 vertebrae.
The top 24 pre-sacral vertebrae are separated by intervertebral discs.
The lower 9 vertebrae fuse in adults, forming the sacrum (5) and coccyx (4).
Vertebrae are named according to their spinal region:
- 7 cervical
- 12 thoracic
- 5 lumbar

Protection: Vertebrae encase and shield the spinal cord, vital for the nervous system.
Support: They provide structural support for upright posture, sitting, and movement.
Flexibility and Mobility: Intervertebral discs act as cushions between vertebrae, enabling spinal flexibility and movement.