Identifier: handbookofphysio1856kirk (find matches)
Title: Hand-book of physiology
Year: 1856 (1850s)
Authors: Kirkes, William Senhouse, 1823-1864
Subjects: Physiology Human physiology
Publisher: London : Walton and Maberly
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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ve small branches, the convolutions of which form coni-form masses, named coni vasculosi; and the vessels continuedfi.om these, after anastomoses in what is called the rete testis,lead finally to the tubules which form the proper substance ofthe testicle, wherein they are arranged in lobules, closelypacked, and all attached to the tough fibrous tissue at theback of the testicle. The tubes, seminal tubes, or tuhuU seminiferi, which com-pose the proper substance of the testicle, are fine thread-liketubules, formed of simple homogeneous membrane, measuiingon an average from yj^th to ^^^yth of an inch, and lined -^vithepithelium or gland-cells. They rarely branch, extend assimple tubes through a great length, with the same uniformstructure, and probably terminate in loops. Their walls are THE SEMINAL FLUID. 645 covered with fine capillary blood-vessels, through which,reckoning their great extent in comparison with the size ofthe spermatic artery, the blood must move very slowly. Fig. 67 *
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The seminal fluid secreted by the testicle is one of thosesecretions in which a process of development is continued after * Fig. 67. Development of the spermatozoids of Certhia famUiaris (thecommon Creeper); after Wagner. 1. Granules of the semen, granulaseminis, obtained from the testicle when very much reduced in sizeduring the winter; 2 to 10, different bodies found in the semen, takenfrom the testicle when very turgid during the summer; 2, 3, granulaseminis, of which many are probably merely cells of epithelium; 4, 5, 6,cysts, or parent cells, containing one or several round granular globulesor nuclei: 7, a similar cyst, in which are two globules, together with amass of granules, and a fasciculus of spermatozoids in the process ofdevelopment; 8, a similar cyst, become oval in form, while the sperma-tozoids have enlarged and are curled up within it; 9, 10, cysts andfasciculi of spermatozoids still further developed; in 10, the fasciculus isready to divide into separate filaments. G

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