What is the total number of vertebrae in the human spine?

The human spine is comprised of a total of 33 vertebrae. This total includes different regions: there are 7 cervical vertebrae in the neck, 12 thoracic vertebrae in the upper back, 5 lumbar vertebrae in the lower back, 5 sacral vertebrae that are fused to form the sacrum, and 4 coccygeal vertebrae, which form the coccyx or tailbone.

These vertebrae are crucial for structural support, protection of the spinal cord, and enabling movement. The total of 33 includes the fused vertebrae of the sacrum and coccyx, accounting for the overall number commonly referred to in anatomical references. Understanding this total can aid in comprehending spinal anatomy and function, which is significant for various medical professions.