CVA A&P - Chapter 5b: Standard Axial Skeleton

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Copyright - Adapted from Glencoe - McGraw-Hill

Transcript of CVA A&P - Chapter 5b: Standard Axial Skeleton

  • 1. PowerPoint Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings PART B 5 The Skeletal System

2. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Axial Skeleton Forms the longitudinal axis of the body Divided into three parts Skull Vertebral column Bony thorax 3. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Axial Skeleton Figure 5.6a 4. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Axial Skeleton Figure 5.6b 5. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Skull Two sets of bones Cranium Facial bones Bones are joined by sutures Only the mandible is attached by a freely movable joint 6. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Lateral View Figure 5.7 7. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Anterior View Figure 5.11 8. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings Paranasal Sinuses Hollow portions of bones surrounding the nasal cavity Functions of paranasal sinuses Lighten the skull Give resonance and amplification to voice 9. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings Paranasal Sinuses Figure 5.10a 10. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings Paranasal Sinuses Figure 5.10b 11. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Hyoid Bone The only bone that does not articulate with another bone Serves as a moveable base for the tongue Aids in swallowing and speech 12. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Hyoid Bone Figure 5.12 13. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Fetal Skull The fetal skull is large compared to the infants total body length Fontanelsfibrous membranes connecting the cranial bones Allow the brain to grow Convert to bone within 24 months after birth 14. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Fetal Skull Figure 5.13a 15. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Fetal Skull Figure 5.13b 16. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Vertebral Column Each vertebrae is given a name according to its location There are 24 single vertebral bones separated by intervertebral discs Seven cervical vertebrae are in the neck Twelve thoracic vertebrae are in the chest region Five lumbar vertebrae are associated with the lower back 17. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Vertebral Column Nine vertebrae fuse to form two composite bones Sacrum Coccyx 18. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Vertebral Column Figure 5.14 19. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Vertebral Column The spine has a normal curvature Primary curvatures are the spinal curvatures of the thoracic and sacral regions Present from birth Secondary curvatures are the spinal curvatures of the cervical and lumbar regions Develop after birth 20. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Vertebral Column Figure 5.15 21. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Vertebral Column Figure 5.16 22. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings Sacrum and Coccyx Sacrum Formed by the fusion of five vertebrae Coccyx Formed from the fusion of three to five vertebrae Tailbone, or remnant of a tail that other vertebrates have 23. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Bony Thorax Forms a cage to protect major organs Consists of three parts Sternum Ribs True ribs (pairs 17) False ribs (pairs 812) Floating ribs (pairs 1112) Thoracic vertebrae 24. Copyright 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Bony Thorax Figure 5.20a