In this research, the state of the gastric secretion in 38 days old ostrich embryos and chicks of different age was investigated by determining the pH level in the stomach as well as the histological structure of the ...In this research, the state of the gastric secretion in 38 days old ostrich embryos and chicks of different age was investigated by determining the pH level in the stomach as well as the histological structure of the deep proventricular glands （gll. proventriculares profundi）. In both parts of the stomach, on the 38th day of embryonic development pH parameters were higher than in chicks after hatching. The proventricular deep gland lobules and secretory epithelium on the 38th day of embryonic development and on the day of hatching were comparatively poorly developed. The most rapid increase of the proportion of the secretory epithelium of the proventricular deep glands was observed just before hatching and during the first week after hatching, but having reached two weeks of age it did not increase any more. The obtained results allow making a conclusion that already on the day of hatching an intensive gastric juice secretion occurs in the proventricular deep glands regardless of the stage of their histological development. The gastric intraluminal pH parameters indicate that the gastric secretion increases with chicks advancing in age, however on the day of hatching this important gastric function is biologically rather complete.展开更多
文摘In this research, the state of the gastric secretion in 38 days old ostrich embryos and chicks of different age was investigated by determining the pH level in the stomach as well as the histological structure of the deep proventricular glands （gll. proventriculares profundi）. In both parts of the stomach, on the 38th day of embryonic development pH parameters were higher than in chicks after hatching. The proventricular deep gland lobules and secretory epithelium on the 38th day of embryonic development and on the day of hatching were comparatively poorly developed. The most rapid increase of the proportion of the secretory epithelium of the proventricular deep glands was observed just before hatching and during the first week after hatching, but having reached two weeks of age it did not increase any more. The obtained results allow making a conclusion that already on the day of hatching an intensive gastric juice secretion occurs in the proventricular deep glands regardless of the stage of their histological development. The gastric intraluminal pH parameters indicate that the gastric secretion increases with chicks advancing in age, however on the day of hatching this important gastric function is biologically rather complete.
