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by xprofessor on November 9th, 2009
In anatomy a fossa is a depression or pit. There are actually *two* glenoid fossas in the skeleton, in both cases where one bone articulates with another. Thus they are both articular fossas.
(1) In the temporal bone of the skull, where the mandible (jawbone) articulates as a hinge.
(2) In the shoulder blade (scapula) where the upper arm bone (humerus) articulates as a ball & socket.
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