File: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 (14596459467).jpg

Identifier: physiologyofcirc00pett (find matches)
Title: 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
Year: 1873 (1870s)
Authors: Pettigrew, James Bell, 1834-1908
Subjects: Blood Blood Circulation Plant Physiological Phenomena
Publisher: Edinburgh : Oliver and Boyd
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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ance of the auriclesnot a few pass through the auricular walls. The nerves supplied tothe auricles are not quite so numerous as those supplied to theventricles. Distribution of the Nerves on the Surface and in the Substance ofthe Ventricles of the Calf—The nerves on the surface of the ven-tricles, if allowance be made for their breaking up slightly to formmeshes, follow a common course; i.e., they run in spiral lines fromright to left downwards. The direction pursued by the nerves isprecisely the opposite of that pursued by the muscular fibres; inother words, the muscular fibres form left-handed spirals, whereasthe nerves, form right-handed spirals. I mention this, becausealthough it has been noted that the nerves cross the muscularfibres obliquely from base to apex, no allusion is made to thecomplete spirals formed by them, particularly as they near the HYSIOLOG\ OF 1IIK CIRCULATION. 249 apex. These points are illustrated at Figs. L46, 117, lis n, 149, and L50. Fig. 1 19. Fig. 150.
Text Appearing After Image:
Pig. 149. -Nerves and ganglia on right ventricle of calf s heart, a, Pulmonary artery, b, Arrta. c. Right auricle, h. Plexus of nerves on right coronary vessels, c, Nerves and gangliaon riuht ventricle. /, Left ventricle, g, Anterior coronary vessels, k, Large ganglion with numerous nerves proceeding to and from it. A large numher of similar but smaller and more delicate ganglia are seen on a close examination.— Original. Tig. 150.—Nerves and ganglia on left ventricle of calfs heart, a, Pulmonary artery, e,1: .-in auricle. <-tli of which it envelops in a beautiful network of nerves and ganglia.The ganglia arc well seen on the left coronary artery (i) and one of the branches (71) of theanterior coronary artery. The swellings or enlargements of the nerves as they cross thevessels arc represented

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