Fig. 71. DISSECTION OF THORAX. a, Right auricle, b, Right ventricle, c, Left 

 ventricle, d, Left auricle. <?, Pulmonary artery. /, Ascending aorta, g, Transverse 

 aorta, h, Superior vena cava. /, Left coronary artery. /, Right marginal artery from 

 right coronary, k, Innominate artery, i, Left recurrent laryngeal nerve. The reference 

 line crosses the trachea. 2, (Esophagus. 3, Left pneumogastric nerve. 4, Vertebral 

 artery. 5, 6, 7,8, and 9, Nerves going to form the brachial plexus. 10, n, and 12, The 

 outer, middle, and inner cords. 13, Scalenus medius muscle ; also first rib. 14, Left com- 

 mon carotid artery. 15, Left subclayian artery. 16, 16, Right pneumogastric nerve. 17, 

 The ascending cervical artery. 18, Right phrenic nerve. 19, Right common carotid 20, 

 Transverse cervical artery. 21, Brachial plexus. 22, Scalenus anticus muscle. 23, Right 

 axillary artery. 24, Right subclavian artery. 25, Internal mammary artery. 26, Upper 

 lobe of right lung. 27, The lower lobe of the same. 28, 29, The diaphragm. 30, Pulmo- 

 nary artery. 31, Bronchus. 32, Pulmonary veins. 



