Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings II. Axial Skeleton: Cranial & Facial Bones Cranial Sphenoid & Ethmoid Facial Paired.

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Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings II. Axial Skeleton: Cranial & Facial Bones Cranial Sphenoid & Ethmoid Facial Paired & Unpaired

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings The Sphenoid Bone Spans the width of the cranial floor Resembles a butterfly or bat Consists of a body and three pairs of processes Contains five important openings

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings The Sphenoid Bone Figure 7.6a, b

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings The Ethmoid Bone Lies between nasal and sphenoid bones Forms most of the medial bony region between the nasal cavity and orbits Figure 7.7

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Facial Bones Unpaired bones Mandible and vomer Paired bones Maxillae, zygomatics, nasals, lacrimals, palatines, and inferior nasal conchae

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Mandible The lower jawbone is the largest and strongest facial bone Composed of two main parts Horizontal body Two upright rami

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Mandible Figure 7.8a

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Maxillary Bones Articulate with all other facial bones except the mandible Contain maxillary sinuses – largest paranasal sinuses Forms part of the inferior orbital fissure

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Maxillary Bones Figure 7.8b

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Maxillary Bones Figure 7.4a

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Other Bones of the Face Zygomatic bones – form lateral wall of orbits Nasal bones – form bridge of nose Lacrimal bones – located in the medial orbital walls Palatine bones – complete the posterior part of the hard palate

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Other Bones of the Face Vomer – forms the inferior part of the nasal septum Inferior nasal conchae Thin, curved bones that project medially form the lateral walls of the nasal cavity

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