. Principles of human physiology : with their chief applications to pathology, hygiene, and forensic medicine : especially designed for the use of students. Web of Frogs foot, stretching between two toes, magnified 3 Diam.; showing the blood-vessels, andtheir anastomoses; a, a, veins; b, b, b, arteries. Fie. i^^Qx^ Capillary circulation in a portion of the web of a Frogs foot, magnified 110 Diam.; a, trunk of vein;6, b, its branches; c, c, pigment-cells. (After Wagner.) OF THE CIRCULATION. 349 distinctly drawn. Hence there is no ground for the assumption that thecapillaries form a distinc
. Principles of human physiology : with their chief applications to pathology, hygiene, and forensic medicine : especially designed for the use of students. Web of Frogs foot, stretching between two toes, magnified 3 Diam.; showing the blood-vessels, andtheir anastomoses; a, a, veins; b, b, b, arteries. Fie. i^^Qx^ Capillary circulation in a portion of the web of a Frogs foot, magnified 110 Diam.; a, trunk of vein;6, b, its branches; c, c, pigment-cells. (After Wagner.) OF THE CIRCULATION. 349 distinctly drawn. Hence there is no ground for the assumption that thecapillaries form a distinct system of vessels in which the arteries terminateand the veins arise. They are in no respect different, except in size, fromthe other vessels. Their anastomosis is very frequent, so that a minute net-work is formed by them; but this is also seen in the distribution of thelarger vessels. It has been maintained by some, that they are mere pas-sages, channelled out of the tissues through which they convey the blood;but this, again, is incorrect, for recent microscopical observations haveshown that they have distinct -iarietes, and that these are composed of afibrous structure analogous to the muscular. Their mode of origin, again,refutes such a supposition; for there can be no doubt that they are produced,
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Keywords: ., bookcentury1800, bookdecade1840, bookpubli, booksubjectphysiology
