. The practice of medicine; a text-book for practitioners and students, with special reference to diagnosis and treatment . Superior cava. Right bronchus Descending aorta. Dorsal vertebra. Fig. io8. — Section through Frozen Thorax at Second Interspace in Front, Looking from abovedownward, Showing Mediastinal Space. the pneumogastric, cardiac, phrenic, and left recurrent laryngeal nerves;the trachea, esophagus, and thoracic duct, and the remains of the thymusgland with lymphatics. The anterior space of the lower or clinical mediastinum is bounded infront by the sternum, posteriorly by the peric
. The practice of medicine; a text-book for practitioners and students, with special reference to diagnosis and treatment . Superior cava. Right bronchus Descending aorta. Dorsal vertebra. Fig. io8. — Section through Frozen Thorax at Second Interspace in Front, Looking from abovedownward, Showing Mediastinal Space. the pneumogastric, cardiac, phrenic, and left recurrent laryngeal nerves;the trachea, esophagus, and thoracic duct, and the remains of the thymusgland with lymphatics. The anterior space of the lower or clinical mediastinum is bounded infront by the sternum, posteriorly by the pericardium, and laterally by. Left bronchus Esophag Dorsal vertebr; Fig. log. —Section through Frozen Thorax at Second Interspace in Front, Looking from belowupward, Showing Mediastinal Spaces. the pleurae. It is wider below than above, and is narrowest in the middle,since at this point the two pleural edges approach each other, while insome instances they are actually in contact. The anterior mediastinumcontains the origins of the triangularis sterni muscles; the intearnl mam- 550 DISEASES OF THE RESPIRATORY SYSTEM mary vessels of the left side; a quantity of loose areolar tissue; a few lymphatic glands, with lymphatics from the upper surface of the liver and twoor three lymphatic glands called anterior mediastinal glands. The middle space contains the heart in its pericardial sac, the ascendingaorta, the superior vena cava, the pulmonary artery and veins, the phrenicnerves, the bifurcation of the trachea, and the roots of the lungs, withnumerous lymphatic glands. It is broader than the anterior or posteriormed
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