1. 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.

2. 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

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