Axial Skeleton - Skull

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

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Axial Skeleton - Skull

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

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