24 



.AlILK SPX'KIOIIOX 



that is, there is enough c(Hinection between the two to allow 

 a portion of the milk to be drawn from the rear quarter through 

 the front teat on the same side, and vice versa. 



The milk-glands j^roper are located near the abdomen and 

 extend a trifle downwards into the udder. The remainder of the 



GLAND-LOBULE. 



''iG. 2. -Schematic figure showing cross-scclinn of cow's udder; and also 

 enlargement of epithelial cells in alveoh when cow is giving milk (i). Each 

 aK coins is surrounded with a membrane called tunica propria. Cell nuclei 

 noL shown. When cow is in milk the\- are also enlarged. When not the 

 epithelial cells are llat and the nuclei small and spindle shaped (2). 



udder is filled with ducts, fibrous and connective tissue, mu.scle, 

 nerves, and blood-vessels, the whole udder assuming a sort of 

 spongy and open condition. 



The teat is simply a cylindrical-shaped body, with a hollow 

 tube extending down through the center of it. At the bottom 



