Fig. 2.8. Small pancreatic duct lumen. 



Five epithelial cells surround the duct lumen which contains light and dense material (/, dz). 

 The apical surfaces of the cells bear microvilli (v) which can be seen in various stages of pinching 

 off. Mitochondria (m), cell nucleus (n) (Siekevitz and Palade, 1956). 



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