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, etcof the Royal college of surgeons of Edinburgh, in the summer of 1872 . he circulation in animals, inasmuch as in their ultimate tissuesthe advancing and receding currents referred to, invariably exist. Such being the nature and general course of the circulation inplants, we naturally turn our attention to the channels and forcesby which the circulation is inaugurated and maintained. In the cellular plants, such as the fungi and li
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, etcof the Royal college of surgeons of Edinburgh, in the summer of 1872 . he circulation in animals, inasmuch as in their ultimate tissuesthe advancing and receding currents referred to, invariably exist. Such being the nature and general course of the circulation inplants, we naturally turn our attention to the channels and forcesby which the circulation is inaugurated and maintained. In the cellular plants, such as the fungi and lichens, and even inthe mosses and hepaticae, there are no distinct channels for thetransmission of fluids; the sap passing from cell to cell in a moreor less complex series by a process of imbibition, much in the sameway that water spreads in a piece of blotting-paper. In such casesthe currents set most strongly towards those spots where growth isproceeding most rapidly. Precisely the same thing happens inrapidly growing or secreting tissues. Thus, the blood is deter-mined to the stags horn when growing, to the mamma whensuckling, and to the stomach when digesting. This constitutesthe vis a f route of modern physiologists. Fig. 9.
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