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 . uplication of the fine membrane lining the pulmonaryartery and aorta, strengthened by certain tendinous bands, and, aswas first satisfactorily demonstrated by Mr W. S. Savory, of a con- 208 DR J. BELL PETTIGREW ON THE siderable quantity of yellow elastic Some of the olderanatomists, among whom may be mentioned Lancisci,2 Senac,3Morgagni,4 Winslow,5 an
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 . uplication of the fine membrane lining the pulmonaryartery and aorta, strengthened by certain tendinous bands, and, aswas first satisfactorily demonstrated by Mr W. S. Savory, of a con- 208 DR J. BELL PETTIGREW ON THE siderable quantity of yellow elastic Some of the olderanatomists, among whom may be mentioned Lancisci,2 Senac,3Morgagni,4 Winslow,5 and Cooper,6 believed that they had detectedthe presence of carneous or muscular fibres ; but Haller,7 and manysince his time, have gravely doubted the accuracy of their observa-tions. Mr Moore8 has figured two sets of muscular fibres, whichhe has termed, according to their supposed action, dilators andretractors ; and Dr Monneret9 has described two similar sets, which,for like reasons, he has named elevators and depressors. I havesought in vain for the muscular fibres in question, and am inclinedto think that when found, they have been mistaken for the tendi-nous bands accidentally stained with blood. The tendinous bands Fig. (^-~-^£__-— , K^ J^/C Fig. 135.—A, Segment of human semilunar valve (pulmonic) suspended from fibrous band(a, a), x, r, Lurmlse which, when the valve is in action, become accurately applied to cor-responding lunulas in the two remaining segments, c, Portion of segment usually thickenedin old people. The thickening is absent in young healthy valves, n, Thickened convex borderattached to fibrous ring of pulmonary artery, o, Thinner portion of segment, s, s, Fibrousbands which split up in the mesial line of the segment, in order to support and strengthen structures are better seen at E, which represents the terminal portion of the aorta ofa whale, with a half segment of one of the semilunar valves attached, a, b,c, Thickened portionof aorta
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectblo, booksubjectblood
