88 



ANATOMY OF THE DOMESTIC FOWL 



Relations. — Internally with the trachea, and externally with the 

 skin and other integument. 





Fig. 20. — The anterior pectoral region, i, Stemo-trachealis. 2, Tracheo- 

 lateralis. 3, Broncho-trachealis brevis. 4, Costal process of sternum. 5, Right 

 and left carotid converging and occupying same sheath at 6. 7, The heart 

 showing branches of coronary artery. 8, Cervical air-sac. 9, Left '? brachio- 

 cephalic artery. 10, Right brachio-cephalic artery. 11, Trachea. 12, Inferior 

 larynx. 13, Subclavian artery. 14, Carotid trunk. 15, Internal thoracic 

 artery. 16 Thyroid gland. 17, Anterior vena cava. 18, Auricular appendage. 



Fig. 21. — The inferior tracheal region, i, Bronchialis anticus. 2, Bronchialis. 

 , Broncho-tracheaUs posticus. 4, Broncho-trachealis anticus. 



posticus. 



Action. — ^A tensor of the true or inferior larynx. 

 Broncho-trachealis Anticus (Fig. 21, No. 4). Location.- 

 portion of the inferior extremity of the trachea. 



-Anterior 



