ANATOMY, EMBRYOLOGY AND HISTOLOGY 



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This conclusion, with but slight modification, has been recently confirmed 

 by Vallois and Perron. The origin in man is a local thickening of the 

 branches of the medial sacral artery. The muscle fibers in the vessel walls 

 have an epithelium-like appearance, and it is this peculiarity which led 



Brandies of middle 

 sacral artery 



Entrance artery 

 into main 



Main glomus 



Fig. 9. Diagram showing the relation of the principal and accessory coccygeal 

 bodies to the middle sacral artery, after Cunningham. 



to the earlier conception of the structure as a gland. In reality,, there is 

 no reason for regarding the coccygeal body as in any way related to the 

 endocrin organs. 



