. The physiology of domestic animals ... Physiology, Comparative; Veterinary physiology. 458 PHYSIOLOGY OF THE DOMESTIC ANIMALS. ready explanation. Each villus under the epithelial coat is supplied with a layer of pale muscular fibres, and when these contract, the central chyle-vessel being full, the effect must be to press out the contents of the central vessel in the direction of the thoracic duct, at the same time emptying the capillary vessels by pressure. When, now, the muscular fibres relax, the capillaries will again become filled, and by the turgidity of the net-work of blood-vessels c
. The physiology of domestic animals ... Physiology, Comparative; Veterinary physiology. 458 PHYSIOLOGY OF THE DOMESTIC ANIMALS. ready explanation. Each villus under the epithelial coat is supplied with a layer of pale muscular fibres, and when these contract, the central chyle-vessel being full, the effect must be to press out the contents of the central vessel in the direction of the thoracic duct, at the same time emptying the capillary vessels by pressure. When, now, the muscular fibres relax, the capillaries will again become filled, and by the turgidity of the net-work of blood-vessels cause the central vessel to become expanded, and so exert a certain amount of suction in the interior of the villus since the valves in the lymphatics will prevent regurgitation. Fig. 170.—Section of an Intestinal Villus op a Horse. (Mlenberger.) A, epithelium; B, adenoid tissue; C, commencement of lacteal. from the mesenteric vessels. Each villus ma}- therefore be regarded as a minute lymphatic heart, which fills itself from the interior of the villus in dilating, and in contracting forces its contents into the circulation. In addition to the absorption of fat, it is evident that other sub- stances contained in the intestinal contents will also mechanically be drawn into the villus with the oil-globules. Thus, unchanged albumen may be absorbed in this manner and has been found in the contents of 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 Smith, Robert Meade, 1854-. Chicago, A. Eger
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