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Mediastinum and the pleura
- 1. THE MEDIASTINUM THE PLEURA & THE LUNGS Anatomy of the Thorax
- 2. E X T E N D S , G E T S D I V I D E D A N D C O N T A I N S Mediastinum
- 3. Mediastinum
- 9. Pleura
- 16. Coz I am an anatomist and I approve this message
Editor's Notes
- Serous membrane that covers the lungs
- The two layers become continuous with one another by means of a cuff of pleura that surrounds the structures entering and leaving the lung at the hilum of each lung (Figs. 3.3, 3.4, and 3.5). To allow for movement of the pulmonary vessels and large bronchi during respiration, the pleural cuff hangs down as a loose fold called the pulmonary ligament (Fig. 3.5). The inferior pulmonary ligament is a fused triangular-shaped sheet of parietal and visceral pleura that extends from the hilum to the dome of the hemidiaphragm. It extends from the mediastinum to the medial surface of the lower lobe and is extra-parenchymal to the lung.
- Right side: (superior to inferior) Eparterial bronchus, pulmonary artery, hyparterial bronchus and pulmonary vein Left Side: (superior to inferior) Pulmonary artery, bronchus and pulmonary vein.
- The costodiaphragmatic recesses are slitlike spaces between the costal and diaphragmatic parietal pleurae that are separated only by a capillary layer of pleural fluid. During inspiration, the lower margins of the lungs descend into the recesses. During expiration, the lower margins of the lungs ascend so that the costal and diaphragmatic pleurae come together again. The costomediastinal recesses are situated along the anterior margins of the pleura. They are slitlike spaces between the costal and mediastinal parietal pleurae, which are separated by a capillary layer of pleural fluid. During inspiration and expiration, the anterior