“The upper part of the illustration (where the bone marrow has been omitted) shows the spongy bone meshwork composed of anastomosing bone trabeculae. Small spaces occupied by osteocytes are seen. In the lower part, the bone marrow occupies the spaces between the trabeculae. Numerous yellow adipose cells can be distinguished under low magnification.”
See the interactive 3D illustration at: tp.txp.to/3d-bone-marrow