The thoracic cavity is divided into right and left pleural cavities and a region situated between these called the mediastinum. The lung invaginates the pleural cavity so completely that only a potential space remains, and by this process the pleura becomes divided into visceral (lung) and parietal (wall) layers (Fig. 220 A).
KeywordsPleural Cavity Costal Cartilage Intercostal Artery Parietal Pleura Visceral Pleura
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