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SUMMARY:6.2 The skull
DTSTART;TZID=America/Los_Angeles:20260407T190000
DTEND;TZID=America/Los_Angeles:20260407T200000
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DESCRIPTION: The skull consists of the bones of the cranium and of the face. They fit together to form a cavity for the protection of the brain. The skull is made up of twenty-two bones closely fitted together without movable joints, with the exception of the lower jaw or mandible. This is attached to the skull by a hinge joint (temporal bone and mandible - temporomandibular joint) on either side that permits movement of the mandible up and down. The upper jaw is called the maxilla. It is firmly attached and does not move. The facial bones form the eye sockets and the nasal and oral cavities.


Bones of the cranium



Two parietal bones - form the central covering for the brain


One occipital bone – forms the posterior covering of the brain


One frontal bone – forms the anterior covering of the brain


Two temporal bones contain the ear cavities, the organs of balance, and the mastoid cells


One sphenoid bone is located in the center and forms the base of the skull


One ethmoid...

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