Physical diagnosis, including diseases of the thoracic and abdominal organs : a manual for students and physicians .. . Bronchi (child) filled with shot. No. 10. Diameter, .03S inch. Lateral view. Above it is the vena azygons major, arching forward tojoin the superior vena cava, and in front of the bronchusis the right pulmonary artery, with the superior venacava and the right phrenic nerve. (Fig. 7.) The left primary bronchus is given off at the bifnrca- 26 ANATOMICAL. tion of the trachea (Fig. 3). It immediately passesunder the arch of the aorta and goes obliquely down-wards and to the left
Physical diagnosis, including diseases of the thoracic and abdominal organs : a manual for students and physicians .. . Bronchi (child) filled with shot. No. 10. Diameter, .03S inch. Lateral view. Above it is the vena azygons major, arching forward tojoin the superior vena cava, and in front of the bronchusis the right pulmonary artery, with the superior venacava and the right phrenic nerve. (Fig. 7.) The left primary bronchus is given off at the bifnrca- 26 ANATOMICAL. tion of the trachea (Fig. 3). It immediately passesunder the arch of the aorta and goes obliquely down-wards and to the left in a direction almost at a rightangle to that of the right bronchus, thus being at great Fig. Bronchi (adult) filled with shot, No. 4. Diameter, .110 inch. variance to the direction of the trachea. It passesbehind the junction of the third costal cartilage with thesternum, its first branches being given off in the leftmammary region twice as far from the tracheal bifurca-tion as the first branch of the right bronchus, and after TOPOGRAPHICAL AND RELATIONAL ANATOMY. 27 the bronchus is well surrounded by lung substance. Thecalibre of the left bronchus is slightly less than that ofthe right bronchus. In the back it lies in the left inter-scapular region a little lower than the right bronchus (Fig. 4). The left bronchus is in relation posteriorly with theleft pneumogastric nerve and one or more lymph glands,the oesophagus being farther back. Still more posteriorlyand to the left of the median line is the descendingaorta. The thoracic duct lies against the anterior sur-faces of the bodies of the vertebra in this region, cross-ing obliquely from right to left and upwards. The pul-mo
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