The American journal of anatomy . 352 R. R. BENSLEY separated from the duct system. The examination of prepara-tions fixed in Zenkers fluid and stained by Mallorys aniline bluemethod for connective tissue, shows that the apparent continuitybetween islets and acini or ducts is real, and that no connectivetissue fibrils are interposed between the islet and the acini withwhich it appears to be continuous. In the islets of this class itis impossible to define a capsule, though such a structure may withjustice be ascribed to the islets of class Fig. 9 Section through a small tubule near its ori
The American journal of anatomy . 352 R. R. BENSLEY separated from the duct system. The examination of prepara-tions fixed in Zenkers fluid and stained by Mallorys aniline bluemethod for connective tissue, shows that the apparent continuitybetween islets and acini or ducts is real, and that no connectivetissue fibrils are interposed between the islet and the acini withwhich it appears to be continuous. In the islets of this class itis impossible to define a capsule, though such a structure may withjustice be ascribed to the islets of class Fig. 9 Section through a small tubule near its origin from the pancreatic duct,showing origin of islet cells from undifferentiated epithelium. In some of the isletcells only a few granules are seen. Guinea pig; chrome sublimate, neutral gentian;c, capillaries; i, islet cells. X 533. The islets of class four are those which have lost their connec-tions with ducts. It is impossible to judge from my preparationshow frequently this separation occurs, for the pressure necessaryto flatten the preparation so as to spread the tissues apart mayhave broken the connections. This has happened frequently,for one can still see the torn duct going in the direction of the STUDIES ON THE PANCREAS OF THE GUINEA PIG 353 islet. In other cases no trace of a duct can be observed. Theseare, nevertheless, few in number and exceptional. Fig. 4, forexample, shows fourteen islets each one of which is directly con-nected to one of the branches of the system of tubules surroundingthe duct. In his recent article L
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901
