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of a vertebrate, in which the notochord (a flexible rod of uniform composition) found in all chordates has been replaced by a segmented series of bonesâvertebrae separated by intervertebral discs.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 coccyx, or tailbone, is the lowest part of the spine. The sacrum is a triangular shaped bone that lies between the lumbar vertebrae and the coccyx. Both sides of the sacrum attach the pelvis. The spine is made up of many parts. It is supported by an upright row of stacked spine bones, called vertebrae.