Tortora - Chapter 7 - The Skeletal System - The Axial Skeleton

Tortora - Chapter 7 - The Skeletal System - The Axial Skeleton

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7-1 Chapter 7 The Skeletal System: The Axial Skeleton Axial Skeleton 80 bones lie along longitudinal axis skull, hyoid, vertebrae, ribs, sternum, ear ossicles Appendicular Skeleton 126 bones upper & lower limbs and pelvic & pectoral girdles
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7-2 Types of Bones 5 basic types of bones: long = compact short = spongy except surface flat = plates of compact enclosing spongy irregular = variable sesamoid = develop in tendons or ligaments (patella) Sutural bones = in joint between skull bones
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7-3 Bone Surface Markings Surface features-- rough area, groove, openings, process Specific functions passageway for blood vessels and nerves joint formation muscle attachment & contraction
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7-4 Bone Surface Markings from Table 7.2 Foramen = opening Fossa = shallow depression Sulcus = groove Meatus = tubelike passageway or canal Condyle = large, round protuberance Facet = smooth flat articular surface Trochanter = very large projection Tuberosity = large, rounded, roughened projection Learning the terms found in this Table will simplify your study of the skeleton.
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7-5 The Skull 8 Cranial bones 14 Facial bones protect delicate sense organs -- smell, taste, vision support entrances to digestive and respiratory systems
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7-6 The 8 Cranial Bones Frontal Parietal (2) Temporal (2) Occipital Sphenoid Ethmoid
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7-7 Frontal Bone Forehead, roof of orbits, Frontal suture gone by age 6 (metopic suture) Supraorbital margin and frontal sinus
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7-8 Parietal sides & roof of cranial cavity Temporal temporal squama zygomatic process forms part of arch external auditory meatus mastoid process styloid process stylomastoid foramen(VII) mandibular fossa (TMJ) petrous portion (VIII)
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7-9 Temporal and Occipital bones Temporal carotid foramen (carotid artery) jugular foramen (jugular vein) Occipital foramen magnum occipital condyles external occipital protuberance attachment for ligamentum nuchae superior & inferior nuchal lines
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7-10 Sphenoid bone Base of skull Pterygoid processes are attachment sites for jaw muscles
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This note was uploaded on 06/11/2009 for the course BIOL 251 taught by Professor Hurrell during the Spring '09 term at Delgado CC.

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Tortora - Chapter 7 - The Skeletal System - The Axial Skeleton

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