Skull Usually consists of 22 bones, all of which (except the lower jaw) are firmly interlocked along lines called “sutures”. Cranium = 8 bones Facial skeleton.

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Presentation transcript:

Skull Usually consists of 22 bones, all of which (except the lower jaw) are firmly interlocked along lines called “sutures”. Cranium = 8 bones Facial skeleton = 13 bones + lower jaw Lower jaw bone is called the mandible, and is the only movable bone.

Cranium Functions: Encloses and protects the brain Provides attachments for muscles that make chewing and head movement possible Has air-filled, mucous-membrane-lined (??), sinus cavities Cavities open to outside

Cranial Bones Frontal bone Parietal bones (2) Occipital bone Temporal bones (2) Sphenoid bone Ethmoid bone