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Anatomy of the Spine. The normal anatomy of the spine is usually described by dividing up the spine into three major sections: the cervical, the thoracic, and the lumbar spine. (Below the lumbar spine is a bone called the sacrum, which is part of the pelvis). Each section is made up of individual bones, called vertebrae. There are 7 cervical vertebrae, 12 thoracic vertebrae, and 5 lumbar vertebrae. An individual vertebra is made up of several parts.
The 5 sections of the spine: 1  The cervical spine makes up the neck and has 7 vertibrae. 2  The thoracic spine has 12 vertibrae which the ribs attach to. 3  The lumbar spine has 5 which make the lower back.  The sacrum consists of 5 bones which are fused or stuck together and the coccyx is made up of 4 tiny bones and used to be a tail.