Definition

Flat bones consist of a layer of spongy bone between two thin layers of compact bone. Their cross-section is flat, not rounded. Examples include the skull and ribs. Flat bones have marrow, but not a bone marrow cavity.

Review Date:8/8/2005
Reviewed By: Kevin B. Freedman, MD, MSCE, Sports Medicine, Orthopaedic Specialists, Bryn Mawr, PA. Review provided by VeriMed Healthcare Network.