. Text-book of normal histology: including an account of the development of the tissues and of the organs. tinum stoutfibrous septa radiate to the pe-riphery, thus dividing the organinto a number of irregular pyram-idal compartments or lobules,in which the seminiferous tubulesare contained. The tunica albu-ginea consists of a dense fibrousfelt-work of bundles of fibro-elastictissue ; the looser, inner layers sup-port numerous blood-vessels, con-stituting the tunica outer surface of the albuginea,through the greater part of itsextent, is covered by the viscerallayer of the tunica
. Text-book of normal histology: including an account of the development of the tissues and of the organs. tinum stoutfibrous septa radiate to the pe-riphery, thus dividing the organinto a number of irregular pyram-idal compartments or lobules,in which the seminiferous tubulesare contained. The tunica albu-ginea consists of a dense fibrousfelt-work of bundles of fibro-elastictissue ; the looser, inner layers sup-port numerous blood-vessels, con-stituting the tunica outer surface of the albuginea,through the greater part of itsextent, is covered by the viscerallayer of the tunica vaginalis,which supplies a serous investmentto much of the testicle, as well asto a portion of the epididymis. The testicle lies behind and out-side the serous sac, the latter be-coming invaginated by the testicle during its descent into the scrotum ; that part of the posterior bor-der of the testicle included between the reflected folds of the tunicavaginalis is devoid of serous covering, and affords a position for theentrance and escape of the blood-vessels, the ducts, the lymphatics,and the Diagram illustrating the course and the rela-tions of the various constituents of the testicleand the epididymis: a, tunica albuginea; ?«,the mediastinum ; t, convoluted, s, straight, por-tions of seminiferous tubules ; r, rete testis ; e,vasa efferentia; c, coni vasculosi; te, tube ofepididymis ; vd, vas deferens ; va, vas aberrans;^, paradidymis. 208 NORMAL HISTOLOGY. The seminiferous tubules may be conveniently divided intothree portions: (i) the tortuous convoluted tubules, whose wind-ings contribute the bulk of the lobule, (2) the straight tubes,situated in the apices of the pyramidal lobules, and (3; the tubuleswithin the mediastinum, which by their union form the retetestis. The seminiferous tubules terminate in the mediastinum, fromwhich situation the seminal canals are continued by intermediate ves-sels connecting testicle and epididymis ; these intermediate tubulesare
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphiladelphiajblipp
