Skull

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

3
Cranial Bones

1. Frontal bone
2. Parietal bones (2)
3. Occipital bone
4. Temporal bones (2)
5. Sphenoid bone
6. Ethmoid bone