The spine is one of the most vital parts of the human body.

See the Interactive Spine
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Upper Neck, Upper Cervical Spine (C1 - C2) Head, face, upper neck, inner & middle ear, sympathetic nerve system, sinuses, eyes, auditory nerves and more. Mid/Lower Neck, Cervical Spine (C3 – C7) Neck, shoulders, thyroid, tonsils, teeth, outer ear, nose, mouth, vocal cords, and more. Mid Back, Thoracic Spine (T1 - T12) Arms, hands, heart, coronary arteries, esophagus, trachea, lungs, bronchial tubes, gallbladder, liver, stomach, pancreas, spleen, kidneys, ureters, adrenal glands, small intestines, and more. Lower Back, Lumbar Spine (L1 - L5) Large intestines, appendix, abdomen, bladder, reproductive organs, lower back, lower extremities, ankles, feet, and more. Basebone or Tailbone, Sacrum and Coccyx Hip bones, tail bone, buttocks, rectum, anus, and more.