Histological Study of feather buds in local chick embryos skin at ten days age by used of    differentiation  stains

	Histological Study of feather buds in local chick embryos skin at ten days age by used of differentiation stains
Magazine of Al-Kufa University for Biology
Article 1, Volume 2, Issue 0, 2010, Pages 117-122
Abstract
This study was investigated in each lab of histological preparations of Artistry Medical institute / Kufa and Al-Sadr hospital in Najaf. The period of histological study is four months from 10/9/2009 to 10/1/2010, twenty five eggs of native chicken were collected,and used natural incubation was. after ten days, Four eggs were hatched for Samples of embryos skin’s were removed and subjected to histological procedures,used three method of stain: Harris Haematoxylin – Eosin , PeriodicAcid-SchiffandVerhoeff-Van Gieson The results of present histological study demonstrate that the skin of tenth days stage differentiated to tow layers: Upper layer is epidermis, which arranged in two rows of cells, the outer row is the periderm and the inner row is the basal layer which thickened and increase its cells in pterylae to form feather buds. The lower layer is dermis which formed from loose mesenchymal tissue, it contains mesenchymal cells and fibers. In this embryonic stage , the dermal condensation can be seen under feather buds, in addition to distribution of large number of anterior- posterior orientation long feather buds where their bases begin to sink creating a circular moat. “Moat” becomes feather follicles. Epidermis of which forms ingrowing thickenings where barbs ridges start to form.

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