. Principles of veterinary science; a text-book for use in agricultural schools. Veterinary medicine. 96 PRINCIPLES OF VETERINARY SCIENCE considerable, reaching at most 10 per cent, above the normal average; a similar increase can be produced by the large amount of saliva secreted during mastication of hay or by exercise. The interval before return to the usual lower water content varies individually; in one case it was only ten minutes in duration, but in general appears to be one or two hours. (3) The bulk of the water leaves the stomach quickly. When the stomach is well filled, the contents
. Principles of veterinary science; a text-book for use in agricultural schools. Veterinary medicine. 96 PRINCIPLES OF VETERINARY SCIENCE considerable, reaching at most 10 per cent, above the normal average; a similar increase can be produced by the large amount of saliva secreted during mastication of hay or by exercise. The interval before return to the usual lower water content varies individually; in one case it was only ten minutes in duration, but in general appears to be one or two hours. (3) The bulk of the water leaves the stomach quickly. When the stomach is well filled, the contents are only Oesophagus. rylorus penetrated very superficially by the water. Digestion of hay by the horse was found by Colin to be facilitated when water was allowed with or shortly after feeding. According to Ellen- berger in order for the horse to obtain the fullest possible nutriment from his ration, hay should be fed first, then water, and finally the grain. This practice differs from that usually followed in this country, but is in keeping with the facts already men- tioned relative to the mechan- ism of the stomach. On account of the limited capacity of the horse's stomach, only a portion of a meal can be accommodated at one time. When he is allowed to eat continuously, some food must pass on to the intestines before stomach digestion has been completed. This may result in digestive disturbances of various kinds,- es- pecially colic. Another interesting point in regard to stomach digestion is that here starch is converted into sugar, in those animals whose saliva is deficient in ptyalin, by a starch-splitting enzyme that is present in all the small grains high in starch. This fact makes it apparent that grain should not be cooked before being fed. Proteins are largely digested in the stomach and small intes- tine. The process of breaking them down is known as putre- faction. It results in the formation of various sharp-smelling Fig. 2 9.— Longitudinal section of stomach a
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectveterin, bookyear1920
