[The endocrinocyte differentiation of the mucosal epithelium of the human appendix]

By electron microscopy, the cambial elements of intestinal epithelium (band cells) are revealed to be sources of formation of the vermiform process epithelium endocrinocytes. By a successive differentiation the band cells are transformed into either secretory cells with monohormonal contents or "mixed" cells. The latter in their turn can be differentiated into mucous cells or lose their mucous component by transforming into endocrinocytes. In addition, mucous cells can be transformed into endocrinocytes by a direct differentiation.