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human skull
The human skull is the bony structure that forms the head in the human skeleton. It supports the structures of the face and forms a cavity for the brain. Like the skulls of other vertebrates, it protects the brain from injury.
The skull consists of two parts, of different embryological origin—the neurocranium and the facial skeleton (also called the ''viscerocranium''). The neurocranium (or ''braincase'') forms the protective cranial vault that surrounds and houses the brain and brainstem. The facial skeleton is formed by the bones supporting the face.
Except for the mandible, all of the bones of the skull are joined together by sutures—synarthrodial (immovable) joints formed by bony ossification, with Sharpey's fibres permitting some flexibility.
==Structure==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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