ELAINE N. MARIEB EIGHTH EDITION 5 Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation by Jerry L. Cook, Sam Houston University ESSENTIALS OF HUMAN ANATOMY & PHYSIOLOGY PART C The Skeletal System

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings ©2006 by Thomson Delmar Learning, a part of the Thomson Corporation. ALL RIGHTS RESERVED. 2 The Torso or Trunk  Sternum  Ribs - 12 pairs  true ribs, false ribs, floating ribs

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings The Bony Thorax  Made-up of three parts  Sternum  Ribs  Thoracic vertebrae Figure 5.19a

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings The Pectoral (Shoulder) Girdle  Composed of two bones  Clavicle – collarbone  Scapula – shoulder blade  These bones allow the upper limb to have exceptionally free movement

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings 5 The Bones of the Upper Extremities  Shoulder Girdle - Clavicle (Collarbone) - Scapula (Shoulder Blade)  Arm  upper arm - humerus  forearm - ulna and radius  wrist - carpals  hand - metacarpals (5/hand)  fingers - phalanges (14/hand)

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Bones of the Shoulder Girdle Figure 5.20a–b

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Bones of the Shoulder Girdle Figure 5.20c–d

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Bones of the Upper Limb  The arm is formed by a single bone  Humerus Figure 5.21a–b

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Bones of the Upper Limb  The forearm has two bones  Ulna  Radius Figure 5.21c

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Bones of the Upper Limb  The hand  Carpals – wrist  Metacarpals – palm  Phalanges – fingers Figure 5.22