Sam Human Skeleton Model with Muscles & LigamentsSam offers all the advantages of a 3B Scientific skeleton. With Sam, you can also demonstrate the movements of the skull via the head joints, and thanks to the fully flexible spine, you can adjust the model to place it in natural body postures. The unique combination of muscle origins and insertions, flexible ligaments, and flexible spine with a slipped disc between the 3rd and 4th lumbar vertebrae clearly the show medical and anatomical interest of