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Lecture 6.6: Skeletal System

Lecture 6.6: Skeletal System. Cervical Vertebrae. Atlas-C1 Holds up head Allows “yes” motion Axis—C2 “No” motion. Figure 6.18. Lumbar Vertebrae. Most massive Least mobile Support most of body weight. Figure 6.17c. Thoracic Cage. Thoracic vertebrae, ribs and sternum

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Lecture 6.6: Skeletal System

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  1. Lecture 6.6: Skeletal System

  2. Cervical Vertebrae • Atlas-C1 • Holds up head • Allows “yes” motion • Axis—C2 • “No” motion

  3. Figure 6.18

  4. Lumbar Vertebrae • Most massive • Least mobile • Support most of body weight

  5. Figure 6.17c

  6. Thoracic Cage • Thoracic vertebrae, ribs and sternum • Protects heart and lungs

  7. Ribs • 12 pairs • True Ribs—first 7 pairs • Connect to sternum via costal cartilage • False ribs—pairs 8-12 • Do not directly attach to sternum • Floating ribs—pairs 11-12 • No connection to sternum

  8. Figure 6.20b

  9. Sternum • Breastbone • Not fully fused until 25 • Xiphoid process—inferior tip

  10. Figure 6.20a

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