Axial Skeleton - Skull
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Axial Skeleton - Skull

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Slideshow of the bones of the Skull, part of the Axial Skeleton

Slideshow of the bones of the Skull, part of the Axial Skeleton

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    Axial Skeleton - Skull Axial Skeleton - Skull Presentation Transcript

    • Axial Skeleton
      TheSkull
    • TheSkull
      Two parts of the skull:
      The cranium encloses and protects the brain
      The facialbones hold the eyes and face shape
    • TheSkull - Cranium
      Eight large flat bones fused together (sutures):
      Frontal – forms forehead
      Parietal – superior and lateral walls (paired)
      Temporal – inferior to parietal, at temples (paired)
      Occipital – posterior wall
      Sphenoid – deep to the anterior of skull, forms floor of cranial cavity
      Ethmoid – forms roof of nasal cavity, medial walls of orbits
    • The Skull - Cranium
    • The Skull - Cranium
    • The Skull - Cranium
    • The Skull - Cranium
    • The Skull - Cranium
    • The Skull - Cranium
    • The Skull - Face
      Thirteen bones fused together, with one connected by joints
      Maxillae – forms upper jaw (paired)
      Palatine – posterior to maxillae, between back molars (paired)
      Zygomatic – cheekbones, lateral walls of orbits (paired)
      Lacrimal – part of medial walls of orbits, between ethmoid bones and maxillae (paired)
    • The Skull - Face
      Continued…
      Nasal – bridge of nose (paired)
      Vomer – median line of nasal cavity
      Inferiorconchae – bone projections from lateral wall of nasal cavity (paired)
      Mandible – lower jaw, connected by only freely movable joint of face
    • The Skull - Face
    • The Skull - Face
    • The Skull - Face
    • The Skull - Face
    • The Skull - Face
    • The Skull - Face
    • The Skull - Face
    • The Skull - Face
    • The Skull
      Hyoid Bone
      Not technically part of skull
      Does not articulate directly with any other bone
      Anchored to temporal bones by ligaments
      Movable base for tongue
      Attachment point for neck muscles
    • The Skull
    • The Skull – Bone Markings
      Bone Markings
      Meatus – canal-like passageway
      External Auditory Meatus – canal leads to eardrum and middle ear (temporal)
      Process – bony prominence
      Styloid Process – inferior to auditory meatus (temporal)
      Zygomatic Process – anterior to cheek bone (temporal)
      Mastoid Process – posterior and inferior to auditory meatus (temporal)
      Palatine Processes – extensions of maxillae that form the anterior part of the mouth (maxillae)
    • The Skull – Bone Markings
      Foramen – opening through bone
      Jugular Magnum – at junction of occipital & temporal bones, opening for jugular vein (temporal)
      Carotid Canal – anterior to jugular foramen, opening for carotid artery (temporal)
      Foramen Magnum – opening for spinal cord to connect to brain (occipital)
      Foramen Ovale – opening for nerve fibers to pass to jaw muscles (sphenoid)
      Condyle – rounded articular projections (involved with joints)
      Occipital Condyles – rest on the first vertebra of the spinal column (occipital)
      Sinuses – cavities in bone filled with air
      Paranasal Sinuses – found in different bones surrounding nasal cavity (frontal, ethmoid, sphenoid, maxillae)
    • The Skull – Bone Markings
    • The Skull – Bone Markings
    • The Skull – Bone Markings