Studies in horse breeding; an illustrated treatise on the science and practice of the breeding of horses (1910) (14774295904)

Identifier: studiesinhorsebr01carl (find matches)

Title: Studies in horse breeding; an illustrated treatise on the science and practice of the breeding of horses

Year: 1910 (1910s)

Authors: Carlson, George Lloyd, 1854-

Subjects: Horses

Publisher: Norfolk, Neb., The author

Contributing Library: The Library of Congress

Digitizing Sponsor: The Library of Congress

Text Appearing Before Image:

Figure 4. Spermatozoon of the horse. (Greatly magni-fiedj The Sexual Organs of the Stallion, The origin ofspermatozoa will require some study of the generativeorgans of the stallion, the most important ones beingshown in figures 5 and 6. Semen must have its start-ing point. This is in the testicles, which are composedof smaller glands, numbering into the hundreds ineases of great sexual vigor. These glands are conical, 16 STUDIES IN HORSE HREEDIXC with their apex pointing upwards, forming a duct tocarry secretions along until all merge into -a smalleriiumher of principle ducts, now ascending and empty-ing into the endidymis, which now doubles upon itself,working back and forming the vas deferens. The vasdeferens or great duct, ascends through the inguinalring, where riipture or hernia sometimes puts in itsappearance. This semen is now floated around the

Text Appearing After Image:

Figure 5. The testicle of the stallion with other glandsdissected of their serous covering: 1, testicle; 2, the secretoryglands; 3, vasa efferentia; 4, endidymis (epididymis) ; 5, vasaberrans; 6, vas deferens; 7, spermatic artery. bladder, in order to be vivified, or given life, by thesecretions of the seminal vesicles, a couple of glandslocated upon the bladder. Before these life germs re-ceive this tluid, they show no signs of life. They alsoreceive another fluid from the prostrate gland. As tothe true origin of spermatozoa, I have yet to everfind one in the testicles of a stallion. I do not wishto be understood as saying the)^ do not originate there, CONCEPTION 17 yet in many years of eager effort in that direction, Ihave never been able to find one there. Many othersreport finding them there, bnt I never could. I have,however, found them all the way from the endidymisto the prostrate gland, but never showing signs of life,until the seminal vesicles are reached. This has been KALEV

horse testicles studies in horse breeding an illustrated treatise on the science and practice of the breeding of horses 1910 book illustrations horses images from internet archive library of congress

1910

Library of Congress

http://commons.wikimedia.org/

public domain