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The dome-shaped main muscle of respiration separating the thorax from the abdomen.
C3-4-5 keep the diaphragm alive; openings: 'I ate (8) ten eggs at twelve' — IVC T8, oEsophagus T10, Aorta T12.
The Intercostal Space and Its Neurovascular Bundle
The gap between two adjacent ribs, filled by three layers of intercostal muscle and carrying the intercostal nerve and vessels in a groove under the upper rib.
The Right Lung
The larger of the two lungs, made of three lobes divided by two fissures, with a hilum on its inner surface where the airways and vessels enter.
The Mediastinum
The central compartment of the chest between the two lungs, holding the heart, great vessels, oesophagus, trachea and other structures.
The Left Lung
The smaller of the two lungs, with two lobes and a notch that makes room for the heart, and a hilum where the airways and vessels enter.
The Trachea and Bronchial Tree
The windpipe and the branching air tubes that carry air from the throat down into the lungs.