Manual of human histology . x-tending the whole lengthof that body,—the retetestis {r. vasculosum Hal-leri) (fig. 257 d). Fromthe upper end of thisplexus, the canals in whichmeasure from ^ to ?^(0-03—0-08), proceed7—15 efferent canals,vasa efferentia testis s,Graafiana, of \—^ (016—0-18) (fig. 257 e),Avhich^ traversing the t. albuginea are continued into theepididymis. Here they contract to ^ and ^, are convolutedin exactly the same way as the spermatic canals in the lobulitestis, but without presenting divisions or anastomoses, andthus produce a certain number of conical bodies^ theapices of
Manual of human histology . x-tending the whole lengthof that body,—the retetestis {r. vasculosum Hal-leri) (fig. 257 d). Fromthe upper end of thisplexus, the canals in whichmeasure from ^ to ?^(0-03—0-08), proceed7—15 efferent canals,vasa efferentia testis s,Graafiana, of \—^ (016—0-18) (fig. 257 e),Avhich^ traversing the t. albuginea are continued into theepididymis. Here they contract to ^ and ^, are convolutedin exactly the same way as the spermatic canals in the lobulitestis, but without presenting divisions or anastomoses, andthus produce a certain number of conical bodies^ theapices of which are directed towards the testis,—the spermaticcones [coni vascidosi s. corpora pyramidalia) (fig. 257 /).These cones, united together by connective tissue, constitutethe head [globus major) of the epididymis, at the upper andposterior border of which their canals gradually coalesce; andthus is formed the simple thick duct of the epiididymis, 0-16—0-2 in diameter (fig. 257,g). This duct, convoluted in a. Fig. 257. Human testis and epididymis, after Arnold: a, testis; 5, lobes; c,ductuli recti; d, rete vasculosum; e, vascula efferentia; f, coni vasculosi; g, epidi-dymis ; h, vas deferens; i, vas aberrans; m, branches of the spermatica interna ofthe testis and epididymis; n, ramification on the testis; o, art. defereiitialis; p,anastomosis with a branch of the spermatic. 224 SPECIAL HISTOLOGY. Avell-known manner, forms the body and tail {globus minor)of the epididymis, usually giving off at its inferior ex-tremity a csecal prolongation, vas aberrans Halleri (fig. 257 i)and is ultimately continuous with the spermatic duct or vasdeferens, which at first \—^^ in diameter and convoluted, soonincreases, to a size of |—V, and becomes straight (fig. 257 h).The epididymis, moreover, has an extremely delicate fibroustunic {^) of a greyish white colour. § 198. Structure of the seminiferous tubes.—The seminal tubes ofthe testis are, in proportion to their diameter,
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Keywords: ., bookcentury1800, bookdecade1850, booksubjecthistolo, bookyear1853
