BRONCHIAL TUBES 



127 



7. The cartilage plates. (a) Several cells in a single 

 cavity. (&) The intracellular network. 



8. The mucous glands, (a) That some of the cells are 



FIG. 85. TRANSVERSE SECTION OF PART OP THE WALL OP A LARGE BRONCHUS. 

 LUNG OF PIG. STAINED WITH H^EMATOXYLIN AND EOSIN (X60). 



E. Epithelial lining. The line from the letter leads to a part of the 



lining containing large mucous cells or goblet cells. 

 I. The internal fibrous coat. 

 M. Muscular coat. 



C. Cartilage plates of external fibrous coat. 



A. Bronchial artery. The pulmonary artery is not included. 



V. Bronchial vein. 



N. Nerve-trunk. < 



G. Mucous glands. 



D. Obliquely sectioned duct. 



stained precisely like the other mucous or goblet cells, along the 

 surface of the membrane. (5) If possible, a gland-tube leading 

 up to tlie lumen of the bronchus. (An ampulliform dilatation 

 is shown in the upper part of the drawing.) 



