No Pictures Thorax Grays2

No Pictures Thorax Grays2 - The Thorax Axial &...

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The Thorax Mammary Glands Surface Anatomy
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Axial vs. Appendicular Skeleton Axial Skeleton Skull = Cranium + Facial bones Vertebrae Ribs Sternum Appendicular Skeleton Bones of upper/lower limbs Limb Girdles Page 14
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The Bony Thorax Sternum Manubrium, Body (Gladiolus), Xiphoid Process Ribs 7 True Ribs 5 False Ribs Clavicle Scapula Vertebrae Cervical,Thoracic, Lumbar, Sacral (Sacrum), Coccygeal (Coccyx) Pg 14
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Projections and Depressions Site of muscle and ligament attachments Spine Process Help form joints Head Facet Allow BV, nerves, and muscles to pass Notch Fossa Pg 624
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Thoracic Cage Borders: Thoracic vertebrae posteriorly Ribs laterally Sternum and costal cartilages anteriorly Forms protective cage around heart, lungs, and other organs Composed of: Sternum Ribs Vertebrae
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The Sternum (Composed of fused sternebrae) Manubrium Jugular (sternal) notch Clavicular Articular facets Sternal Angle – 2 nd rib Body (Gladiolus) Articulates w/ribs 2-7 Xiphosternal joint Xiphoid process Cartilage-calcifies thru time Partial attachment of many muscles Pg 120
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The Ribs Usually, 12 pairs 7 True ribs -direct attachment to sternum 5 False ribs -indirect or no attachment to sternum Floating ribs -make up 2 of 5 False ribs, no ventral attachment Typical Ribs Ribs # 2-9 Atypical Ribs Ribs #1, 10, 11, 12 Reinforce thoracic cage Pg 120
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Rib Anatomy Typical Ribs Head Neck Tubercle Angle Shaft Subcostal Groove Pg 121
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Rib Anatomy Atypical Ribs #1-short, flat (S-I), wide, Supports Subclavian vessels #1, 10-12 articulate with only = # vertebra #11, 12 don’t articulate with transverse processes, or anteriorly at all Pg 121
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Typical Rib Articulation Dorsal (P) Attachment Thoracic Vertebrae Head of Rib 2 costal facets Superior costal facet Inferior costal facet of vertebra above it Intervertebral disc Tubercle of Rib Transverse Costal Facet e.g. Rib #4 articulates with Superior Costal Facet and Transverse Costal Facet of T4 & Inferior Costal Facet of T3 Ventral (A) Attachment to Sternum Via costal cartilage
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Attaches upper extremity to axial skeleton Holds upper extremity away from skeleton for mobility Pectoral Girdle Pg 623, 624, 646
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No Pictures Thorax Grays2 - The Thorax Axial &...

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