. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. (bundance of id particles t wfth fat. from tn ezccated crtin- ir death (Ponke). in quantity olesterin and s same animal â oteids (fibrin, urea,leucin); rhich sodium udant position of imilar to that both to blood, light, though be regarded at its red ooiv jle as lymph iitral fat in a of division, nenti of th* â¢nthrs.âIn me birds, and )re are lymph there are two DIGESTION OP FO
. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. (bundance of id particles t wfth fat. from tn ezccated crtin- ir death (Ponke). in quantity olesterin and s same animal â oteids (fibrin, urea,leucin); rhich sodium udant position of imilar to that both to blood, light, though be regarded at its red ooiv jle as lymph iitral fat in a of division, nenti of th* â¢nthrs.âIn me birds, and )re are lymph there are two DIGESTION OP FOOD. 345 axillary and two sacral lymph hearts. The latter are, espe- cially, easily seen, and there is no doubt that they are under the control of the nervous system. In the mammals no such special helps for the propulsion of lymph exist. There is little doubt that the blood-pressure is always higher than the lymph-pressure, and when the blood-vessels are dilated the fluid within the perivascular lymph-channels is likely com- pressed; muscular exercise must act on the lymph-channels as on veins, both being provided with valves, though themselves readily compressible; the inspiratory efforts, especially when forcible, assist in two ways: by the compressing effect of the respiratory muscles, and by the aspirating effect of the negative pressure within the thorax, producing a similar aspirating effect within the great veins, into which the largo lymphatic trunks empty. The latter are provided at this point with valves, so that there is no back-flow; and, with the positive pressure within the laige lymphatic trunks (thoracic duct, etc.), the physical conditions are favorable to the outflow of lymph or chyle. Our knowledge of the nature of the passage of the chyle from the intestines into the blood is now clearer than it was till recently, though still incomplete. The exact structure of a villus is to be carefully considered. If we assume that the muscular cells in its stru
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Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1890, bookyear1890
