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Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Skeletal System- Axial- Vertebrae.

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Presentation on theme: "Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Skeletal System- Axial- Vertebrae."— Presentation transcript:

1 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Skeletal System- Axial- Vertebrae

2 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings A Typical Vertebrae, Superior View Figure 5.17 Not all vertebrae look alike, but they do share certain structures: 1.Body: weight bearing portion, faces anteriorly 2.Vertebral arch: composed of lamina and pedicle

3 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings A Typical Vertebrae, Superior View Figure Vertebral foramen: canal in which the spinal cord passes 4.Transverse process: lateral extensions (2) 5.Spinous process: single projection pointing posterior 6.Articulate processes: site of vertebral joints

4 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Regional Characteristics of Vertebrae Figure 5.18a 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

5 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Regional Characteristics of Vertebrae Figure 5.18b Foramen for the carotid artery 90 degree forms an “L” Looking for ideas on remembering thoracic?

6 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings 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 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Bony Thorax (AKA: Thoracic Cage)  Forms a cage to protect major thoracic organs  Consists of three parts  Sternum  Ribs  Thoracic vertebrae

8 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Boney Thorax (AKA: Thoracic Cage) Figure 5.20a Sternum: (composed of 3 bones) manubrium Body xiphoid process

9 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Boney Thorax (AKA: Thoracic Cage) Figure 5.20a Ribs: 12 pairs 1st seven “true” ribs, attach to sternum 8-10 “false” ribs indirectly attached to sternum or not attached AKA floating ribs


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