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 . cular fibres shorten in the direction of the breadth of the vessel, 1 In phthisical patients, as Dr Stokes has shown, a smart tap on a muscularpint is followed by a contraction and swelling of the part struck. The partstruck is surprised, and contracts or rolls itself together. FHYSIOLOGY OF THE CIRCULATION. 189 the longitudinal fibres elongating in the direct
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 . cular fibres shorten in the direction of the breadth of the vessel, 1 In phthisical patients, as Dr Stokes has shown, a smart tap on a muscularpint is followed by a contraction and swelling of the part struck. The partstruck is surprised, and contracts or rolls itself together. FHYSIOLOGY OF THE CIRCULATION. 189 the longitudinal fibres elongating in the direction of its movements are reversed if the vessel is to be widened. Ifa cavity is to be obliterated by longitudinal and circular fibres, thefibres shorten longitudinally and transversely. If it is to be opened,they elongate. If oblique fibres are present, they are accessories,and deport themselves in exactly the same way as the others. Inhollow muscles the fibres require to be continuous upon themselves,and this accounts for the fact, that in the heart, stomach, bladderand uterus, the fibres have neither origin nor insertion. (VideFigures, 124, 125, 126, 127, 128, 129, 130.) Fig. 124. > Fig. 125. Fig. 126. Fig. Fig. 124.—Vessel supplied with circular or transverse fibres (a), capable of increasing or de-creasing its calibre, and of shortening or elongating it.— Original. Fig. 125.— Vessel supplied with circular (a) and longitudinal (b) fibres, capable of increasingor diminishing its calibre, and of shortening or elongating it.— Original. Fig. 126.—Hollow muscle provided with circular (a) and longitudinal (h) fibres, capable ofincreasing and diminishing its cavity so as to take in and eject fluid.— Original. Fig. 127.—Hollow muscle provided with circular (a), longitudinal (b), and oblique (e, d)fibres, capable of opening and closing, and of taking in and ejecting fluid. In this case theopening and closing, because of the presence of the oblique
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