Abstract
1. The structure ofthe cancellous bone ofthe third lumbarvertebral body from a twenty-year-old woman who died from head injuries was studied, using serial section reconstruction techniques.
2. In addition to the construction of enlarged models from different regions of the vertebral body, measurements were made of the bone area, the surface area, and the thickness and spacing of the bony structures.
3. The vertebral spongiosa consists of a complex network of bony plates perforated by rounded openings of varying size. The plates show preferential orientation in the vertical and horizontal planes, and the amount of bone is greatest towards the upper and lower surfaces of the vertebral body.
4. The mechanical significance of the structure of the vertebral spongiosa is discussed.
