Histological study of the hoof developtnent in sheep

In order to study of the hoof development in sheep, 16 healthy sheep embryos with different ages immediately after slaughters of their mothers in slaughter house were collected hooges were cut half sagitlly and fixed in 10% buffered foraaaalin. Routine histologic processes were used and 6J.1 thick paraffin sections were stained by haematoxylin-eosin method and studied under lightmicroscope. The hoof has covered by the real skin at first. The primary changes will be seen on the stratum genninativum of the hoof skin, which caused to fonnation of the tunica intema of the wall and the papillary layer of the sole and heel. The more supperficiallayers were then made by them, so that the tunica media of the wall were made by the epidermis of the corium and upper t of thewall. It made up of hard keratin, thus the manufacturing epidermis of this layer were devoided of the stratum granulosum and keratohyalin gtanules. The tubular layer of the white line were made by the lower t epidermis of the wall. The papillay layers of other parts of the hoof were made by the papillary epide11uis of the same parts. The last layer were made before birth was the tunica e:xtema. Thislayer were made by the papillay epidennis of the periople skin.

Keywords:

Development , Hoof , Sheep , Wall , Periople