The Human Spine The human spine has 33 bones this allows twisting, bending, and rotation And it protects the spinal cord. The spine has 5 regions: Cervical spine: C1-C7 Thoracic spine: T1-T12 Lumbar spine: L1-L5 Sacral spine: S1-S5 Coccyx The spine is an “S” curve: the neck is concave, and the middle is convex, and the […]