This fully flexible spine includes the pelvis, occipital plate, cervical, thoracic and lumbar vertebrae, sacrum, coccyx, complete pelvis with symphysis, and removable femur heads. Vertebral arteries, spinal nerve branches and prolapsed L3 - L4 intervertebral disc are depicted. The left side of the skeleton shows the points of origin (red) and points of insertion (blue) of the muscles.