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Medullary Cavity
By: Tim Barclay, PhD
Medically reviewed by: Stephanie Curreli, MD, PhD
Last Updated: Jun 23, 2015
The medullary cavity is a cylinder at the center of compact bone. It surrounds and protects the spongy bone marrow, which contains a material, much like gelatin. It is the central cavity of bone shafts. It is where yellow bone marrow (or adipose) is produced and stored.
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