CHAPTER XI. 

 G-LANDS OF THE ALIMENTARY CANAL. 



Most of the sections of glands will require to be fixed to the 

 slide by means of shellac fixative very thinly applied. 



Parotid Gland (Serous) Cat. (p. 3, inj., s. 21, c. P., m. B.) 

 (L) Small lobules separated by loose inter-lobular connective 

 tissue. The acini are of rather uniform appearance, and can 

 be recognised under this power. The ducts and their branchings 

 are obvious inside and between the lobules, and are accompanied 

 by blood-vessels. (H) The acini are filled with redundant 

 secreting epithelial cells of the serous variety. Their nuclei 

 are placed near the periphery of the cell, and the cytoplasm 

 is finely reticulated. Acquaint your eye with the general 

 appearance of these cells. Find the commencement of ducts 

 in the acini, at first lined by flattened cells to change to cubical 

 and even columnar forms in the larger canals. 



Sub-maxillary Gland. Dog. (Mucous.} (p. 8, inj., s. 22 & 24, 

 c. P., m.B.) (L) The lobules are more compact than in the last, 

 the acini larger, and the ducts less numerous. (H) The 

 secreting epithelium is larger, the cytoplasm less reticular and 

 very transparent in appearance, and the nucleus is pressed 

 against the attached surface of the cell. Recognise the crescentic 

 cells or demilunes (Gianuzzi) placed outside the mucous cells, and 

 which occasionally jut inwards between them. Their cytoplasm 

 is delicately reticulated, resembling the substance of the serous 

 cell, and the nucleus is rounded. The ducts are lined by cubical 

 epithelium, the larger ones being accompanied by blood-vessels 

 and ganglionated nerves. 



