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Biology 323 Human Anatomy for Biology Majors Lecture 16 Dr. Stuart S. Sumida PowerPoint Presentation
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Biology 323 Human Anatomy for Biology Majors Lecture 16 Dr. Stuart S. Sumida

Biology 323 Human Anatomy for Biology Majors Lecture 16 Dr. Stuart S. Sumida

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Biology 323 Human Anatomy for Biology Majors Lecture 16 Dr. Stuart S. Sumida

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  1. Biology 323 Human Anatomy for Biology Majors Lecture 16 Dr. Stuart S. Sumida Overview of Structure of the Adult Skull

  2. The developing skull has three component origins: • Condrocranium (base of skull / braincase) • Dermatocranium (flat bones of skull) • Splanchnocranium (bones derived from gill arch elements)

  3. Mode of Germ Layer • Formation Origin • Condrocranium Endochondral Mesoderm • Dermatocranium Dermal Neural Crest • Splanchnocranium Endochondral Neural Crest

  4. CHONDROCRANIUM: Bones of the base of the skull. • Most major cranial nerves escape the skull through these. • Endochondral • Mostly Mesodermal • Include: ethmoid, sphenoid (part), occipital (part) right and left temporal (parts).

  5. orbit II/ Ethmoid Sphenoid Petrous temporal Basioccipital

  6. Flat bones of skull: DERMATOCRANIUM (These and others.)

  7. Gill Pouch Bones: become SPLANCHNOCRANIUM

  8. This lecture will revolve around the early embryology of the vertebrate skull. One of the landmark achievments in this was the summary of that topic – based initially the developing embryonic shark head – by Edwin S. Goodrich. Thus it has come to be known as the “Goodrich Diagram”.

  9. From Studies on the structure and development of vertebrates by Edwin S. Goodrich, 1958.

  10. If you’re working with the PowerPoint files, save space in your notes to draw here.

  11. Mandible (Lower Jaw)

  12. Skull – Anterior View

  13. Anterior Inferior Frontal

  14. Ethmoid superior lateral

  15. Bones of the Orbit

  16. Skull – Lateral View

  17. Maxilla: Lateral View

  18. External Internal Parietal

  19. Temporal Internal External

  20. Neonatal Temporal Bone

  21. Skull – Superior View

  22. Skull – Posterior View

  23. Inferior Internal Occipital

  24. Skull – Inferior View