. Cunningham's Text-book of anatomy. Anatomy. 1090 THE KESPIRATOKY SYSTEM. great arteries which spring from it; (2) the innominate veins and part of the vena cava superior; (3) the trachea, oesophagus, and thoracic duct; (4) the phrenic, vagi, and cardiac nerves, and the left recurrent nerve; (5) the thymus. The middle mediastinum is the wide part of the area which contains the pericardium, and lies below the superior mediastinum. In addition to the pericardium and its contents the middle mediastinum contains the phrenic nerves and their accompanying vessels. The ventral mediastinum is that pa
. Cunningham's Text-book of anatomy. Anatomy. 1090 THE KESPIRATOKY SYSTEM. great arteries which spring from it; (2) the innominate veins and part of the vena cava superior; (3) the trachea, oesophagus, and thoracic duct; (4) the phrenic, vagi, and cardiac nerves, and the left recurrent nerve; (5) the thymus. The middle mediastinum is the wide part of the area which contains the pericardium, and lies below the superior mediastinum. In addition to the pericardium and its contents the middle mediastinum contains the phrenic nerves and their accompanying vessels. The ventral mediastinum is that part of the interpleural region which lies between the pericardium dorsally and the body of the sternum ventrally. In its superior Spinal medulla Trachea . - - (Esophagus „,-'4th thoracic vertebra ,--Innominate artery .-•Left common carotid Left innominate vein. Manubrium sterni Synchondrosis sternalis Right pulmonary artery Pericardial cavity Left atrium Aortic valve Body of sternum Right atrio- ventricular valve Diaphragm Descending aorta Xiphoid process Fig. 867.—Sagittal Section through the Thorax of an Old Man. The superior border of the manubrium sterni and the bifurcation of the trachea are lower than in the average adult. part this region can hardly be said to exist, seeing that there the two pleural sacs come into contact with each other on the ventral aspect of the pericardium; but below the level of the sternal ends of the fourth costal cartilages the left pleura falls short of the right pleura, and an interval is apparent. The only contents to be noticed in the ventral mediastinum are a few lymph glands and some areolar tissue, in which ramify some lymph vessels, and some minute twigs from the internal mammary artery. The dorsal mediastinum is that part of the interpleural region which is situated dorsal to the pericardium. It may be regarded as an inferior continua- tion of the more dorsal part of the superior mediastinum, and many of the structures in the one
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
