. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative. Fig. 190. Fig. 191. Pig. 190.—Vein with valves lying open (Dalton). Fig. 191.—Vein with valves closed, the blood passing on by a lateral branch below (Dalton).. 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 Mills, Wesley, 1847-1915. New York, Appleton

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Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1890, bookyear1890