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Skeletal System-

Skeletal System-. Axial-. Vertebrae. A Typical Vertebrae, Superior View. Not all vertebrae look alike, but they do share certain structures: Body: weight bearing portion, faces anteriorly Vertebral arch: composed of lamina and pedicle. Figure 5.17. A Typical Vertebrae, Superior View.

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Skeletal System-

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  1. Skeletal System- Axial- Vertebrae

  2. A Typical Vertebrae, Superior View Not all vertebrae look alike, but they do share certain structures: Body: weight bearing portion, faces anteriorly Vertebral arch: composed of lamina and pedicle Figure 5.17

  3. A Typical Vertebrae, Superior View Vertebral foramen: canal in which the spinal cord passes Transverse process: lateral extensions (2) Spinous process: single projection pointing posterior Articulate processes: site of vertebral joints Figure 5.17

  4. Regional Characteristics of Vertebrae Cervical Vertebrae (7) Atlas: First vertebra (no body) Allows “yes” nod, by holding the occipital condyles (see green arrow) Axis: 2nd vertebra (small body) Allows “no” pivot where the dens articulates to the atlas Figure 5.18a

  5. Regional Characteristics of Vertebrae Looking for ideas on remembering thoracic? Foramen for the carotid artery 90 degree forms an “L” Figure 5.18b

  6. Sacrum and Coccyx • Sacrum • Formed by the fusion vertebrae • Forms posterior wall of pelvis • Articulates to the hip • Coccyx • Formed from the fusion of vertebrae • “Tailbone”

  7. The Bony Thorax (AKA: Thoracic Cage) • Forms a cage to protect major thoracic organs • Consists of three parts • Sternum • Ribs • Thoracic vertebrae

  8. Boney Thorax (AKA: Thoracic Cage) • Sternum: (composed of 3 bones) • manubrium • Body • xiphoid process Figure 5.20a

  9. Boney Thorax (AKA: Thoracic Cage) Ribs: 12 pairs 1st seven “true” ribs, attach to sternum 8-10 “false” ribs indirectly attached to sternum or not attached 11-12 AKA floating ribs Figure 5.20a

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