Final answer:
The union of all vertebral foramina forming an apparent vertical cylinder in the vertebral column is known as the vertebral canal or spinal canal, which encases the spinal cord.
Step-by-step explanation:
The name given to the union of all vertebral foramina into an apparent vertical cylinder is the vertebral canal or spinal canal. When all the vertebrae are aligned during the assembly of the vertebral column, their vertebral foramina forms this continuous, elongated canal which houses and protects the spinal cord.
The vertebral arches, comprised of pedicles and laminae, form the walls of this canal. Individuals have several regions within their vertebral column, including cervical, thoracic, lumbar, sacral, and coccygeal regions, which all contain vertebrae with these foramina that align to create the spinal canal.
The vertebral canal is the anatomical structure formed by the union of vertebral foramina, serving as the protective pathway for the spinal cord within the vertebral column. Its significance lies in safeguarding the spinal cord and facilitating the transmission of neural signals throughout the body.