NURS 1000G Lecture Notes - Lecture 1: Thoracic Cavity, Thoracic Vertebrae, Axilla
23 May 2016
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Week 1 & 2 objectives: thorax and lungs i & ii (2) position & surface landmarks. 12 pairs of ribs (1-7 attached to sternum; 8,9,10 attach to costal cartilage; 11,12 floating: costochondral junctions points at which ribs join cartilage; not palpable. 12 thoracic vertebrae diaphragm (musculotendinous septum separating thoracic cage from abdomen) (3) thoracic cavity & lung borders. C7 marks apex of lung tissue; t10 base, during inspiration drops to t12. Diaphragm contracts on inhalation allowing lungs to drop to t12 and expands on exhalation to move up to t10. Right lung shorter than the left lung due to liver. Left lung narrower than right lung because the heart bulges to the left. Right lung 3 lobes, left lung 2 lobes. Each lobe affected differently (one may have pneumonia, rest may not) anterior chest: contains primarily upper and middle lobes. Oblique fissure (diagonal fissure) crosses 5th rib in the midaxillary line and ends at.
