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How many cervical vertebrae?
7
How many thoracic vertebrae?
12
How many lumbar vertebrae?
5
How many sacral vertebrae?
5 fused to form the sacrum
How many coccygeal vertebrae?
4 fused to form the coccyx
Vertebral body
Purpose: structural support
Relation: intervertebral discs, superior and inferior
Vertebral arch
Contains paired laminae and pedicles
Pedicles project to join laminae
Laminae unite at the midline
Relations:
superior/inferior notches to pedicles, forming intervertebral foramen for spinal nerves
Vertebral processes
Spinous process in midline
Two transverse processes laterally
Four articulate processes (zygapophyses), two superior and two inferior
Pars interarticularis = bone in between superior/inferior
Identifying C3-C6
“Typical” vertebrae
Small body with raised margins