THE TRACHEA AND LUNGS. 



147 



FIG. 170. SECTION OF PART OF CAT'S LUNG, STAINED WITH NITRATE OF SILVER. 

 (Klein. ) ( Highly magnified. ) 



The smalf granular and the large flattened cells of the alveoli are shown. In the middle 

 is a section of a lobular bronchial tube, with a patch of the granular pavement- 

 epithelium cells on one side. 





. 171. SECTION OF INJECTED LUNG, INCLUDING SEVERAL CONTIGUOUS ALVEOLI. 



(F. E. Schultze.) (Highly magnified.) 



a, free edges of alveoli ; c, c, partitions between neighbouring alveoli, seen in section ; 

 6, small arterial branch giving off capillaries to the alveoli. The looping of the vessels 

 to either side of the partitions is well exhibited. Between the capillaries is seen the 

 homogeneous alveolar wall with nuclei of connective tissue corpuscles and elastic fibres. 



