Labels:text | screenshot | diagram OCR: Body Fluids December, 1993 page 2 of 12 The Lungs and Chest Cavity Rib Trachea Collarbone Bronchial Tube 0 0 Left Lung 0 0 (Cross Section) PO Upper Lobe 10 0 Middle Lobe Ribs Lower Lobe Pleura A Chest Cage Pleural Space Pericardium Diaphragm (Pleural Fluid) (Pericardial Fluid) Serous Fluids The pleura encloses the lungs, the peritoneum and the intestinal tract. Normally, the two layers of mesothelium are separated only by a thin layer of fluid that facilitates movements of the two membranes against each other. Therefore, the cavities are not true cavities, but only become so in the presence of disease.
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