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

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Fetal Skull  The fetal skull is large compared to the infant’s total body length  Fontanels—fibrous membranes connecting the cranial bones  Allow the brain to grow  Convert to bone within 24 months after birth

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Fetal Skull Figure 5.13a

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Fetal Skull Figure 5.13b

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

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Vertebral Column  Nine vertebrae fuse to form two composite bones

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Vertebral Column Figure 5.14

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  Secondary curvatures are the spinal curvatures of the cervical and lumbar regions

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Vertebral Column Figure 5.15

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Vertebral Column Figure 5.16

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings A Typical Vertebrae, Superior View Figure 5.17

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

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

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

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

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Sacrum and Coccyx  Sacrum  Coccyx

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Sacrum and Coccyx Figure 5.19

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Bony Thorax  Forms a cage to protect major organs  Consists of three parts

Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Bony Thorax Figure 5.20a