InnerBody.com and Healthline.com provide online interactive diagrams of the lower back, while SpineUniverse.com offers several smaller static diagrams. WebMD also provides diagrams of the lower back on its slideshow that explains common causes of lower back pain.
InnerBody.com offers both a 2D and a 3D interactive diagram of the lower back and pelvis bones. Users can click on individual bones from the diagram or from a corresponding list to learn more about that particular bone's name, development and purpose. The 3D version allows users to rotate the skeleton for a more comprehensive view. Healthline.com's lower back diagram is similar to InnerBody.com's 2D diagram, but it displays the lower back's superficial muscles in addition to its bones. The static diagrams from SpineUniverse.com, on the other hand, focus on the lower portion of the spinal cord, illustrating lumbar joints, segments and nerves.