. The anatomy of the domestic animals. Veterinary anatomy. 422 DIGESTIVE SYSTEM OF THE HORSE Lymphoid tissue occurs in the form of distinct nodules (NoduH IjTnphatici), which are either scattered or in groups. In tlie former case they are termed solitary nodules (Nochdi lymphatici solitarii), in the latter aggregated nodules or Peyer's patches (Noduli l\Tnphatici aggregati). The solitary nodules are ahout the size of a millet-seed or a small sago grain. The patches are situated chiefly along the surface opposite to the mesenteric attachment and begin about three or four feet from the pylorus.
. The anatomy of the domestic animals. Veterinary anatomy. 422 DIGESTIVE SYSTEM OF THE HORSE Lymphoid tissue occurs in the form of distinct nodules (NoduH IjTnphatici), which are either scattered or in groups. In tlie former case they are termed solitary nodules (Nochdi lymphatici solitarii), in the latter aggregated nodules or Peyer's patches (Noduli l\Tnphatici aggregati). The solitary nodules are ahout the size of a millet-seed or a small sago grain. The patches are situated chiefly along the surface opposite to the mesenteric attachment and begin about three or four feet from the pylorus. They nuinber one to two hundred, and are usually one to two inches (2 to 5 cm.) long and a cjuarter of an inch to one-half inch (ca. 2 to 14 mm.) wide. Larger ones occur in the terminal part, where one patch may have a length of seven to fifteen inches (ca. 17 to 38 cm.) and a width of half an inch to one inch (ca. 5 to 25 mm.) in young horses (Ellenberger). They vary much in number, size, and distriliution in different individuals, and undergo atrophy in old subjects. Vessels and Nerves.—The arteries of the small intestine come from the cceliac and anterior mesenteric arteries. The veins go to the portal vein. The lymph-vessels are numerous and go to the mesenteric lymph glands, thence to the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sisson, Septimus, 1865-1924. Philadelphia, London, W. B. Saunders Company
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