The term casings refer to the intestinal tract of the animal or gut set. For pigs it consist of the stomach, large and small intestines, middle cap, bladder and bung, for cattle the casings consist of the stomach,, bladder, small intestine, large intestine, bung. Certain parts of the cassings can be processed into a number of value added products, such as sausage skins, surgical sutures and strings for musical instruments and tennis rackets. Processing of casings involve desliming to remove the inner lining "mucosa" and washing. If casings are not processed into value added products, they are generally sent for rendering with or without prior washing.
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