Structure of skin:The skin of farm animals (Fig. 29.12) has been described as the largest organ of the body. It covers the outer surfaces of all animals. The skin is made up of two layers - epidermis and dermis.
EpidermisThe epidermis is the outermost layer and it is made up of three layers: (i) cornified layer (ii) granular layer (iii) malpighian layer.
The cornified layer:It is the outermost layer of the epidermis. It is made up of flat, hard and scaly cells. The cells of cornified layer are dead.
The granular layer:This contains the living cells where active division of cells takes place. These cells replace the cells of the granular layer which in turn are replacing the cells of the cornified layer which are constantly being worn-out.