Archive image from page 195 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 An efferent vessel and a portion of the head of the epididymis magnified, to show the progressive dimi- nution of the canal of the cone, and the calibre of this vessel, in comparison with that of the canal of the epididymis. c, vas deferens; d, inflected portion of the duct; e e, head of the epididymis. (After Lauth.) vasa efferentia terminate, closely connected by areolar tissue. Monro described this canal as gradually increasing in size from the head to t
Archive image from page 195 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 An efferent vessel and a portion of the head of the epididymis magnified, to show the progressive dimi- nution of the canal of the cone, and the calibre of this vessel, in comparison with that of the canal of the epididymis. c, vas deferens; d, inflected portion of the duct; e e, head of the epididymis. (After Lauth.) vasa efferentia terminate, closely connected by areolar tissue. Monro described this canal as gradually increasing in size from the head to the tail, and he estimated its calibre about its middle at J of an inch. Lauth states that its size is subject to great irregularities in different parts and in different subjects. This anatomist has particularly described the con- volutions of this duct, and has shown that they are regularly arranged in four series, which successively increase in size ; the first being the smallest, and the fourth the largest. The arrangement will be understood by reference to the subjoined figure. Monro estimated the length of the canal at thirty feet eleven inches. Lauth found its mean length to be nineteen feet four inches eight lines. The parietes of the canal are strong, and bear considerable resistance. The canal of the epididymis ter- minates in the excretory duct of the testicle, the vas deferens, and is usually contracted at the part where the two join, which accounts for the mercury when forced into the vas de- ferens being often arrested at this point. It was calculated by Monro that the semen, be- fore arriving at the vas deferens traverses a tube forty-two feet in length. Lauth, how- ever, makes the whole distance but little more than twenty-two feet. Vasculum aberrans. — This name was given by Haller to a blind duct or coscal appendage often found connected either to the epi- Canal of the epididymis partly unravelled, to show the four series of inflections u-liich the duct
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