[The histotopography of the endocrinocytes in the rectal epithelium of hens in ontogeny].
Histotopography and content of argyrophilic and argentaffin endocrinocytes per 1 mm2 of section of the hen rectal mucosa in ontogenesis were studied by method of light microscopy. Endocrinocytes were demonstrated in a part of epithelial layer from 12 day of embryogenesis. By 21 day their number increased 23 times. By the 3rd day of postnatal development endocrinocyte number reaches definitive values. Endocrinocytes are evenly distributed in the rectal epithelium, their shape varies. Forming of the endocrine apparatus structural organization in the hen rectum deals with the processes of the early endocrinocyte differentiation in a part of the epithelial layer during embryogenesis.
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D001078:APUD Cells / Q000166:cytology*; D000375:Aging; D000818:Animals; D000831:Animals, Newborn; D002642:Chick Embryo; D002645:Chickens / Q000033:anatomy & histology* / Q000254:growth & development; D004759:Enterochromaffin Cells / Q000166:cytology; D004847:Epithelial Cells; D004848:Epithelium / Q000196:embryology / Q000254:growth & development; D005260:Female; D012007:Rectum / Q000166:cytology* / Q000196:embryology / Q000254:growth & development; D013194:Staining and Labeling / Q000379:methods