It also helps you twist, bend, and otherwise alter your trunk and neck position. There are typically 24 movable bones in the spine that connect to the sacrum (a bony structure located below the lumbar ...

It contains the following: Sacrum. A spade-shaped bone that is formed by the fusion of 5 originally separate sacral vertebrae. Coccyx (tailbone). Formed by the fusion of 4 originally separated ...