*Papillae are present on the medial surface of the cheeks in ruminants. These large, pointed and densely spaced projections of keratin provide protection to the underlying epithelium due to the rough diet. | *Papillae are present on the medial surface of the cheeks in ruminants. These large, pointed and densely spaced projections of keratin provide protection to the underlying epithelium due to the rough diet. |