MANUAL OF CATTLE- FEEDIIS-O. 



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Fig. 8 —Lobule of Milk-gland 



sented in Fig. 8. Tliey consist of a thin, straetiireless 



membrane^ a, lined with epithelial 

 cells, h. From three to eight of 

 these vesicles are grouped together 

 and surrounded by connective tisbiie, 

 dj forming a lobule which has a com- 

 mon outlet, €j for all the vesicles. 

 Several^of these lobules, again, are 

 united into a lobe, also surrounded 

 bj connective tissue, and ha\ing a 

 common outlet, which empties into 

 the milk-cistern. 

 The udder of the cow consists of a right and left half, 

 each composed of numerous lobes surrounded by connec- 

 tive tissue. The two halves are separated from each other 

 by a partition of connective tissue, and the whole is cov- 

 ered with more or less abundant fat- tissue, upon which fol- 

 lows the skin. 

 Considerable fat 

 is also found in 

 the interior of 



the organ, and 

 its amount may 

 sometimes be so 

 great that, in 

 spite of an enor- 

 mously large ud- 

 der, there is only 

 a small quantity 

 of real glandu- 

 lar tissue, and 

 the yield of milk is correspondingly scanty. In Fig. 9, a 

 represents the mass of lobes ; h shows several of the outlets 



Fig 9 — (WilckenB ) Section of a Cow''s TTddcr 



