The physiology of the circulation in plants : in the lower animals, and in man : being a course of lectures delivered at surgeons' hall to the president, fellows, etc of the Royal college of surgeons of Edinburgh, in the summer of 1872 . upon as an evolution or development of the chy-liferous. The colourless corpuscles, which are so abundant inthe lymphatic vessels, reappear in the capillaries of the vascularsystem, and are known as the white corpuscles of the are possessed of independent movements and change have attracted an unusual share of attention of late from thepo
The physiology of the circulation in plants : in the lower animals, and in man : being a course of lectures delivered at surgeons' hall to the president, fellows, etc of the Royal college of surgeons of Edinburgh, in the summer of 1872 . upon as an evolution or development of the chy-liferous. The colourless corpuscles, which are so abundant inthe lymphatic vessels, reappear in the capillaries of the vascularsystem, and are known as the white corpuscles of the are possessed of independent movements and change have attracted an unusual share of attention of late from thepower they possess of forcing themselves through the thin wallsof the capillaries. The capillaries vary in size from tsoo to Woo ofan inch in diameter, and form an infinite variety of minute loops,being now straight, now slightly waved, and now tortuous. Theygenerally form a network so dense that the point of a pin cannot beintroduced without lacerating some of them. The capillaries of thevascular system lie midway between the arterial and venous sys-tem—the arteries conducting to and the veins from them. Aroundand between the capillaries is a system of still more minutevessels, the hypervascular canals. Fig. 88 Fig. 89. Fig. Fig. 88.—A minute artery (a), ending in (b) larger and (c) smaller capillaries, d, Nucleiembedded in the walls of the capillaries. Magnified 200 diameters. Fig. 89.—A, Epithelial cells of the arteries, a, The nucleus. B, Muscular fibres of thearteries: the middle one, having been treated with acetic acid, shows more distinctly thenucleus (a). Magnified 300 diameters. Fig. 90.—A, a small artery. B, a small vein, both treated with acetic acid; a, fibrouscoat; b, nuclei of the muscular coat; c, nuclei of the epithelial coat. Magnified 300diameters.—After Ilvxley. The capillaries form a sort of neutral territory, in which theblood meanders more slowly in order to afford the tissues the fullestopportunity of imbibing nourishment, and discharging ef
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectblo, booksubjectblood
