172 



ANATOMY OF THE DOMESTIC FOWL 



The neck of the uriniferous tubule as it emerges from Bowman's 

 capsule is short and narrow and is lined with a few cuboidal cells. 



FIG. 52. 



A. Photomicrograph of a section of a kidney showing three lobules, i, Cor- 

 tical portion of lobule showing glomeruli. 2, The central or medullary portion 



o: the lobule. 3, The outer surface of the kidney. 



B. Salts from the urine of a hen. i, Uric acid crystals. 2, Sodium urate 

 crystals. 



Toward the glomerular end the cells are of a transitional form gradu- 

 ally merging into the flat squamous type peculiar to Bowman's 



