Two years into an Arctic expedition, they were forced to abandon ship a thousand miles north of Siberia. The Best Nonfiction Books of 2014 William OâConnor December 14, 2014 Going to the library was like a treasure hunt, an expedition.
The vertebral column, also known as the backbone or spine, is part of the axial skeleton. The vertebral column is the defining characteristic of a vertebrate, in which the notochord (a flexible rod of uniform composition) found in all chordates has been replaced by a segmented series of bonesâvertebrae separated by intervertebral discs.
The cervical spine is the most superior portion of the vertebral column, lying between the cranium and the thoracic vertebrae. It consists of seven distinct vertebrae, two of which are given unique names: 1  The first cervical vertebrae (C1) is known as the a tlas.