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The Axial Skeleton

The Axial Skeleton. Formed from 80 named bones Consists of skull, vertebral column, and bony thorax. Figure 7.1. The Skull. Figure 7.2a. Overview of Skull Geography. The skull contains approximately 85 named openings Foramina, canals, and fissures Provide openings for important structures

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The Axial Skeleton

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  1. The Axial Skeleton • Formed from 80 named bones • Consists of skull, vertebral column, and bony thorax Figure 7.1

  2. The Skull Figure 7.2a

  3. Overview of Skull Geography • The skull contains approximately 85 named openings • Foramina, canals, and fissures • Provide openings for important structures • Spinal cord • Blood vessels serving the brain • 12 pairs of cranial nerves

  4. Cranial Bones • Formed from eight large bones • Paired bones include • Temporal bones • Parietal bones • Unpaired bones include • Frontal bone • Occipital bone • Sphenoid bone • Ethmoid bone

  5. Sutures • Sagittal • Coronal or Frontal • Squamosal • Lambdoidal • Sutural (Wormian) Bones • Usually found in Lambdoidal suture

  6. Sutures Figure 7.3a

  7. Sutures

  8. Fontanels in Newborn • Anterior fontanel • Posterior fontanel • Anterolateral fontanel • Posterolateral fontanel

  9. Fontanels Figure 7.21a

  10. Fontanels Figure 7.21b

  11. Skull Bones • Frontal • Parietal • Occipital • Temporal

  12. Skull bones: Frontal, Parietal, Occipital, Temporal Figure 7.3a

  13. Inferior Aspect of the Skull: Temporal and Occipital bones Figure 7.4a

  14. Skull Bones • Lacrimal • Maxilla • Mandible

  15. The Skull: Lacrimal, Maxilla, Mandible

  16. Skull bones • Sphenoid • Ethmoid

  17. The Sphenoid Bone Figure 7.6a, b

  18. The Ethmoid Bone Figure 7.7

  19. Skull Bones • Hyoid bone

  20. More Skull Bones to know • Palantine bones • Zygomatic bones • Vomer • Nasal bones

  21. Palantine bones Figure 7.4a

  22. Zygomatic bones Figure 7.3a

  23. Vomer and Nasal bones Figure 7.2a

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