File:On the anatomy of vertebrates (electronic resource) (1866) (14751022125).jpg

Identifier: b20416039_003 (find matches)
Title: On the anatomy of vertebrates (electronic resource)
Year: 1866 (1860s)
Authors: Owen, Richard, 1804-1892
Subjects: Anatomy, Comparative Vertebrates Fishes Reptiles Mammals Birds
Publisher: London : Longmans, Green
Contributing Library: Wellcome Library
Digitizing Sponsor: Wellcome Library

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Genital organs of Hermaphrodite Goat, the male partspredominating, ccxxxix. DESCENT OF TESTES. 7.59 In the human foetus this structure, called ( gubernaculum testis,fig. 594, consists of a central axis of soft gelatinous substancerife with nucleate cells and surrounded by fibrous tissue, whichsoon exhibits the striped characteristic of voluntary muscle. Someof these fibres rise from the bottom of the scrotum, 10, and traversethe abdominal ring, c, here diagrammatically indicated in Cur-lings excellent article ccxlii; by Pouparts ligament, 7, 7 : asecond series of fibres, 9, arise from Pouparts ligament, and,with the pubic fibres, 8, seem in many Lissencephala to be aninverted part of the internal oblique and transversales muscles:the whole, inclosed by aveolar tissue, and connected by a fold of 594 595
Text Appearing After Image:
Diagram of the gubernaculum and testicle Diagram of the testicle immediately after its arrival previous to its descent, ccxlii. in the scrotum, ccxlii. peritoneum to the psoas muscle, extends to the testis, 2. Thisc gubernaculum shrinking or contracting, or both, between thefifth and six months of human gestation, draws the testis frombelow the kidney, i, to the abdominal ring, 6, where it rests tothe end of the seventh month. During the eighth month ittraverses the inguinal canal, and by the end of the ninth monthhas reached the scrotum, where it is commonly found at birth,with the remnant of the scrotal part of the gubernaculum,fig. 595, 2. The iliac, 4, and the pubic, 5, portions of the mus-cular tissue have now become the i cremaster: the bag of peri-toneum, 3, 3, carried out with the testis, l, is converted, byobliteration of the neck, into 6 tunica vaginalis testis. In scrotalMammalia, as a rule, it remains pervious, and it communicateswidely with the abdomen in periodical testi

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