Morphological Studies on the Development of the Bronchial Epithelium of the Fetal Camel Lung
Identifieur interne : 000F12 ( Main/Merge ); précédent : 000F11; suivant : 000F13Morphological Studies on the Development of the Bronchial Epithelium of the Fetal Camel Lung
Auteurs : G. Kamel [Égypte] ; W. Mubarak [Égypte] ; R. Sayed [Égypte]Source :
- Anatomia, Histologia, Embryologia [ 0340-2096 ] ; 2005-12.
Abstract
Light microscopic observations revealed that in camel foetuses of 25 mm crown‐to‐rump length (CRL) the primordial tubular system of the prospective lung was formed of several tubules lined by undifferentiated columnar epithelium. Intra‐epithelial neuroendocrine cells were the first elements to be differentiated in the lining epithelium of the primordial tubular system of the prospective lung as early as 25 mm CRL. On reaching 50–67 mm CRL, the primordial tubular system started to differentiate into two systems of primordial tubules, the prospective bronchial or light tubules and the future respiratory or dark tubules. The lining epithelium of the prospective bronchial tubules revealed a clear evidence of ciliogenesis as early as 80 mm CRL. From 800 mm CRL onwards, the bronchial epithelium demonstrated ciliated and non‐ciliated secretory cells. The non‐ciliated secretory cells of the bronchial epithelium of fetal camel lung showed moderate reaction to AB/PAS technique, for the first time, in fetuses reaching 600 mm CRL.
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DOI: 10.1111/j.1439-0264.2005.00669_54.x
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