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of a vertebrate, in which the notochord (a flexible rod of uniform composition) found in all chordates has been replaced by a segmented series of bonesâvertebrae separated by intervertebral discs.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 human spine serves to protect the bundle of nerves known as the spinal cord. The spine is a central and crucial connector within the human skeletal structure. The tailbone, or coccyx, is the lowest segment of the spinal column. The spine has some side-to-side flexibility. The spine consists of 33 bones, or vertebrae, divided among five regions. Sections of the spine. The coccyx, also known as the tailbone, is part of the spine.