. In the walls of the pro- ventriculus are the gas- tric glands which secrete the gastric juice required for the digestion of the albuminoid constitu- ents of the food. The different forms assumed bj' the gastric glands in various species of birds are illustrated in Fig. 16. The simplicity or complication of these glands indicates to a certain extent the kind of food which is natu- ral to the s]:)ecies. The gastric juice may digest flesh, fish, and ground feed while .still in the proventriculus, but it can not act upon grains and seeds until these have been crushed in the gizzard. Catarrh or i
. In the walls of the pro- ventriculus are the gas- tric glands which secrete the gastric juice required for the digestion of the albuminoid constitu- ents of the food. The different forms assumed bj' the gastric glands in various species of birds are illustrated in Fig. 16. The simplicity or complication of these glands indicates to a certain extent the kind of food which is natu- ral to the s]:)ecies. The gastric juice may digest flesh, fish, and ground feed while .still in the proventriculus, but it can not act upon grains and seeds until these have been crushed in the gizzard. Catarrh or inflammation of the mucous membrane of the stomach is a not uncommon disease, and one which seriously interferes with the vigor and Turkey. Ostrich. Fig. 16.—Gastric plands of birds.
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Keywords: ., bookcentury1800, bookcollectionamer, bookdecade1890, bookyear1899
