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 B The Skeletal System

Copyright © 2006 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

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings 3 Cranial Bones  Frontal bone (1)  Parietal bones (2)  Occipital bone (1)  Temporal bone (2)  Sphenoid bone (1)  Ethmoid bone (1)  Auditory ossicles (6)

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings ©4 Facial Bones  Nasal bones (2)  Palatine bones (2)  Maxillary bones (2)  Zygomatic bones (2)  Lacrimal bones (2)  Nasal conchae (2)  Vomer bone (1)  Mandible (1)

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings The Skull Figure 5.7

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings ©6 The Orbits, Nasal Cavities, and Foramina  Orbits - cavities enclose and protect the eyes  Foramina  passageways for blood vessels and nerves  foramen magnum - spinal cord passage

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Bones of the Skull Figure 5.11

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Superior View Figure 5.8

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Paranasal Sinuses  Functions of paranasal sinuses  Lighten the skull  Give resonance and amplification to voice Figure 5.10

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Paranasal Sinuses  Hollow portions of bones surrounding the nasal cavity Figure 5.10

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Inferior View Figure 5.9