AP Chapter 7 Notes.docx - Chapter 7 The Skeleton Page 1 of 30 The Skeleton Axial –80 bones Three major regions o Skull o Vertebral column o Thoracic

AP Chapter 7 Notes.docx - Chapter 7 The Skeleton Page 1 of...

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Chapter 7: The Skeleton Page 1 of 30 The Skeleton Axial –80 bones Three major regions o Skull o Vertebral column o Thoracic cage Appendicular –126 bones o Girdles (pectoral and pelvic) o Upper and lower limbs o Wrist and ankle, phalanges Chapter 7: The Skeleton Page 1 of 30
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Chapter 7: The Skeleton Page 2 of 30 The Skull 1. Formed by two sets of bones a. Cranial bones (cranium) i. Enclose the brain in the cranial cavity ii. Provide sites of attachment for head and neck muscles 2. Facial bones a. Framework of face b. Cavities for special sense organs for sight, taste, and smell c. Openings for air and food passage d. Sites of attachment for teeth and muscles of facial expression Chapter 7: The Skeleton Page 2 of 30
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Chapter 7: The Skeleton Page 3 of 30 Skull Geography Cranial cavity Middle and internal ear cavities Nasal cavity Orbits 85 named openings o Foramina, canals, fissures Chapter 7: The Skeleton Page 3 of 30
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Chapter 7: The Skeleton Page 4 of 30 Eight Cranial Bones Frontal bone Parietal bones (2) Occipital bone Temporal bones (2) Sphenoid bone Ethmoid bone Frontal Bone Anterior portion of cranium Most of anterior cranial fossa Superior wall of orbits Contains air-filled frontal sinus Chapter 7: The Skeleton Page 4 of 30
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Chapter 7: The Skeleton Page 5 of 30
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