Bones of the Thoracic Cage
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| What are the elements of the thoracic cage? | The thoracic vertebrae, ribs, sternum and costal cartilage.
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| Intercostal Spaces | Spaces between the ribs, occupied by the intercostal muscles.
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| Sternum | Lies in the anterior midline of the thorax, also known as the breastbone.
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| Manubrium | Superior portion of the sternum, shaped like the knot in a necktie.
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| Clavicular Notches | Notches found on the lateral portion of the manubrium that articulate with the clavicles.
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| Body of the Sternum | The midportion of the sternum, forms the bulk of the sternum, sides are notched to articulate with cartilages of the 2nd to 7th ribs
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| Xiphoid Process | Inferior portion of the sternum, plate of hyaline cartilage in youth but ossified in adults.
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| Jugular Notch | Central indentation in the superior border of the manubrium, in line with T2 and T3 and point where the left common carotid artery issues from the aorta.
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| Sternal Angle | Horizontal ridge across the front of the sternum where the manubrium joins the sternal body, in line w/ T4 and T5 and at the level of the 2nd pair of ribs.
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| Xiphisternal Joint | Where the sternal body and the xiphoid process fuse, lies oppositie T9.
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| True Ribs | Vertebrosternal ribs, pairs 1-7, attach to the thoracic vertebrae and directly to the sternum via costal cartilages.
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| False Ribs | Pairs 8-10 known as vertebrochondral ribs, join to the sternum indirectly via costal cartilage, pairs 11-12 vertebral or floating ribs, have no anterior attachment.
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| Costal Groove | Groove on the inferior border of each rib that houses intercostal nerves and blood vessels.
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Created by:
nursingstudent1999
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