“Cranium” and “crania” redirect here. For other uses, see Cranium (disambiguation). 50x40pxThis article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. This article incorporates text from a public domain edition of Gray’s Anatomy. The skull is a bony structure in the head of many animals that supports the structures of the face and forms a cavity for the brain.