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The Skeletal System

The Skeletal System. Overview And The Skull. The Skeletal System. Includes the following: Bones (206) Cartilages Ligaments. Functions. Support and protection Storage of calcium Blood cell production Movement. Two Divisions. Axial

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The Skeletal System

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  1. The Skeletal System Overview And The Skull

  2. The Skeletal System • Includes the following: • Bones (206) • Cartilages • Ligaments

  3. Functions • Support and protection • Storage of calcium • Blood cell production • Movement

  4. Two Divisions • Axial • Bones associated with skull, thorax and vertebral column • 80 bones

  5. 2. Appendicular • Bones associated with extremities and shoulder and hip joints • 126 bones • 80 + 126 = 206

  6. Bone Terminology (p. 128)

  7. Axial Skeleton

  8. Breakdown

  9. Breakdown (Axial) • Skull – 22 • Auditory ossicles – 6 • Hyoid – 1 • Thoracic cage – 25 • Vertebral column – 26 • Total = 80

  10. The Skull • 22 bones • Cranial – 8 • Those in direct contact with the brain • Facial – 14 • Those not in contact w/ the brain

  11. The Skull cranial facial

  12. Sutures Immovable joints between skull bones

  13. Sutures

  14. A. Cranial bones1. Frontal (anterior)

  15. 1. Frontal (lateral)

  16. 1. Frontal (superior)

  17. 2. Parietal

  18. 3. Temporal

  19. Temporal (disarticulated)

  20. External auditory canal

  21. Mastoid process

  22. Styloid process

  23. Zygomatic process

  24. Squamous portion

  25. Mandibular fossa

  26. Petrous portion

  27. 4. Occipital (posterior)

  28. 4. Occipital (inferior)

  29. 4. Occipital (superior)

  30. 5. Sphenoid • Center bone of the skull • Most skull bones articulate with it. • List the bones that do and those that don’t!

  31. 5. Sphenoid (superior)

  32. 5. Sphenoid (lateral)

  33. 5. Sphenoid (inferior)

  34. 5. Sphenoid (superior)

  35. Sphenoid (disarticulated and superior)

  36. Sphenoid(disarticulated and posterior) 2 large wings 2 small wings 2 feet

  37. Greater wing (posterior)

  38. Greater wing (superior)

  39. Greater wing (lateral)

  40. Lesser wing (posterior)

  41. Lesser wing (superior)

  42. Sella turcica (superior)

  43. Sella turcica (sagittal)

  44. Pituitary gland

  45. Pterygoid processes (posterior)

  46. Pterygoid processes (inferior)

  47. 6. Ethmoid (superior)

  48. Olfactory Nerve

  49. 6. Ethmoidcribriform plate

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