Histological Study of skin in local embryo chickens at seven days age  by using  different  stains methods

	Histological Study of skin in local embryo chickens at seven days age by using different stains methods
Magazine of Al-Kufa University for Biology
Article 1, Volume 3, Issue 1, 2011, Pages 99-107
Abstract
This study was investigated in each lab of histological preparations of Artistry technical institute / Kufa and Al-Sadr hospital in Najaf. The period of histological study is from 10/9/2009 to 10/1/2010, the aim was studying histological the skin in local embryo chick at seven days by using different stains methods and measurement of the epidermis and dermis thick in feather bud and interbud regions , twenty five eggs of native chicken were collected,and used natural incubation was.after seven 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 seventh 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 in pterylae to form epidermal placode. The lower layer is dermis which formed from loose mesenchymal tissue, it contains mesenchymal cells and fibers. In this stage, dermal condensation can be seen under epidermal placodes that give short feather buds and lightly long buds in which, invaginated in base of its epidermis that assumed to be present in the following stage.

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