Introducing Fred the Flexible Skeleton. Fred’s spine can bend to mimic any natural human movement. Once flexed, it will remain fixed in position to demonstrate correct and incorrect posture or various pathological conditions. In addition, all skull movements at the neck joints can be demonstrated. Spinal nerve exits and vertebral arteries are shown as is a dorso-lateral disc prolapse between the 3rd and 4th lumbar vertebrae. Supplied with roller stand and dust cover. Measures 66-7/8".