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In the articulated spine, the successive vertebral foramina of the stacked vertebrae (together with adjacent structures) collectively form the spinal canal (vertebral canal) which lodges the spinal cord and its meninges as well as spinal nerve roots and blood vessels.
Anatomy figure: 02:01-06 at Human Anatomy Online, SUNY Downstate Medical Center - "Superior and lateral views of typical vertebrae"
Vertebral foramen - BlueLink Anatomy - University of Michigan Medical School
Atlas image: back_bone16 at the University of Michigan Health System - "Typical Lumbar Vertebra, Superior View; Lumbar Vertebral Column, Oblique Lateral View"