Etymology:
The word "sphenoid" comes from the Greek words "sphen" meaning "wedge" and "oid" meaning "like" or "resembling".
Meaning:
The sphenoid is a wedge-shaped bone located at the base of the skull. It forms part of the anterior and middle cranial fossae, and contributes to the formation of several important structures, including the sella turcica (which houses the pituitary gland) and the optic canal (through which the optic nerve passes).
Origin:
The sphenoid bone is formed from a single ossification center that appears in the cartilage of the cranial base around the 8th week of gestation. The ossification process continues until adulthood, with the different parts of the sphenoid fusing together to form the characteristic wedge-shaped bone.
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