Biol129_C7 - The Skeletal System The Axial Skeleton Update Add ACB 24-26 The axial skeleton contains the Skull Spine(vertebral column Ribs The

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1 The Skeletal System The Axial Skeleton Update *** Add ACB 24-26 *** • The axial skeleton contains the: • The skull derives from intramembranous ossification – There are two plates with marrow in between – The outer plate is thick – The inner plate is thin and brittle
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2 The Skull • Composed of two general sections: • Bones of the Cranium – Occipital, Parietal, Frontal, Temporal, Ethmoid, Sphenoid • Bones of the Face – Nasal, Vomer, Lacrimal, Zygomatic, Palatine, Maxilla, Mandible, Inferior Nasal Concha Cranial Bones – Frontal View • “STEPOF” • Create you own acronym
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3 Cranial Bones - Lateral Cat Skull Differences • In the cat: • The Frontal bone has two parts – The confluence of sutures is the “bregma” • The Eye Socket is incomplete – The “postorbital processes” are not fused • The Zygomatic is the Malar bone
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4 Facial Bones • Nasal (2) •Vom e r (1 ) • Zygomatic (2) • Maxilla (2) • Concha (2) • Palatine (2) • Mandible
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5 Paranasal Sinuses • Important as entrance sites for infection • Make head feel “stuffy” • Maxillary sinus can communicate with teeth • The mastoid sinus (not a paranasal
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This note was uploaded on 03/31/2008 for the course BIOL 129 taught by Professor Sachshowardgeor during the Spring '08 term at Pennsylvania State University, University Park.

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Biol129_C7 - The Skeletal System The Axial Skeleton Update Add ACB 24-26 The axial skeleton contains the Skull Spine(vertebral column Ribs The

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