1178 



thyroidea ima (when that vessel exists), the Sternohyoid and Sternothyroid muscles, the cervical 

 fascia, and, more superficially, by the anastomosing branches between the anterior jugular veins; 

 in the thorax it is covered from before backward by the first piece of the sternum, the remains 

 of the thymus gland, the left innominate vein, the arch of the aorta, the innominate and left com- 

 mon carotid arteries, and the deep cardiac plexus. Posteriorly, it is in relation with the oesoph- 

 agus; laterally, in the neck, it is in relation with the common carotid arteries, the lateral lobes 

 of the thyroid gland, the inferior thyroid arteries, and recurrent laryngeal nerves; and, in the 

 thorax, it lies in the upper part of the interpleural space (superior mediastinum), and is in relation 

 on the right with the pleura and right vagus, and near the root of the neck with the innominate 

 artery; on its left side are the recurrent laryngeal nerve, the aortic arch, the left common carotid 

 and subclavian arteries. 



PIGLOTTIS 



EPARTERIAL 

 BRONCHIAL 

 BRANCHES 



HYPAHTERIAL 

 BRONCHIAL 

 BRANCHES 



HYP*RTER(AL 



BRONCHIAL 



BRANCHES 



FIG. 891. Front view of cartilages of larynx, the trachea and bronchi. 



The Right Bronchus (bronchus dexter) (Fig. 891), wider, shorter, and more 

 vertical in direction than the left, is about an inch in length (2.5 cm.), and enters 

 the hilum of the right lung opposite the fifth thoracic vertebra It forms an angle 



