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COCCYGEAL

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Originally appearing in Volume V08, Page 636 of the 1911 Encyclopedia Britannica.
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COCCYGEAL See also:

BODY This is a small median body, about the See also:size of a See also:pea, situated in front of the See also:apex of the coccyx and between the insertions of the levatores See also:ani muscles. It resembles the See also:carotid body in its microscopical structure, but is not so vascular. Concentric corpuscles, like those of the thymus, have been recorded in it. It derives its See also:arteries from the See also:middle sacral and its nerves from the sympathetic. Of its See also:embryology and See also:comparative See also:anatomy little is known, though J. W. See also:Thomson See also:Walker has recently shown that numerous, outlying, See also:minute masses of the same structure See also:lie along the course of the middle sacral artery (Archie f. mikroscop. Anat. Bd. lxiv.). The See also:probability is that, like the carotid body, it is sympathetic in origin. (See also:Quain's Anatomy gives excellent illustrations of the See also:histology of this as well as of all the other ductless glands.) For the literature on and further details concerning the foregoing structures the following See also:works should be consulted: Quain's Anatomy,vol. i (19o8,See also:London,Longman & Co.) ; McMurrich'sDeaelopment of the Human Body (London, Rebman, 1906); Wiedersheim's Vergleich. Anat. der Wirbeltiere (See also:Jena, 1898).

' (F. G.

End of Article: COCCYGEAL

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