[Endocrine cells in the rabbit colon mucosal epithelium].
The epithelium of the rabbit colon was studied by light and electron microscopy. The highest number of endocrinocytes in colon are observed in terminal parts of colon, i.e. in a distal part of appendix (135 +/- 15 cells/mm2) and in rectum (142 +/- 20), to decrease in the ileocaeal region (caecum proxinmal part--39 +/- 9, colon proximal part--56 +/- 9), where the least number of cells was marked. Agrentaffin cells (EC) number the same way, however, with a weaker difference in the number of cells between terminal departments and ileocaeal region. An electron microscope study of mucosal epithelium of the colon enabled us to identify 5 types of endocrinocytes. I-III types: EC-, D- and L-cells. IV and V are seldom met types, the same way as the "mixed" cells have been indentified. Whose cytoplasm simultaneously contained both mucous and endocrine granules. The received data show a certain degree of similarity in the endocrine apparatus of the rabbit with that of humans, although essential differences exists in regards of the appendix pattern.
Kostiukevich
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D000818:Animals; D002452:Cell Count; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D019858:Enteroendocrine Cells / Q000166:cytology* / Q000648:ultrastructure; D007413:Intestinal Mucosa / Q000166:cytology* / Q000648:ultrastructure; D007420:Intestine, Large / Q000166:cytology* / Q000648:ultrastructure; D008297:Male; D008854:Microscopy, Electron; D011817:Rabbits / Q000033:anatomy & histology*