File:Image from page 336 of "Chordate morphology" (1962) (19989510384).jpg
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[edit]DescriptionImage from page 336 of "Chordate morphology" (1962) (19989510384).jpg |
Title: Chordate morphology Identifier: chordatemorpholo00joll Year: 1962 (1960s) Authors: Jollie, Malcolm Subjects: Morphology (Animals); Chordata Publisher: New York, Reinhold Contributing Library: MBLWHOI Library Digitizing Sponsor: MBLWHOI Library
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Text Appearing After Image: kidney seminal vesicle prostate gland (bulbourethral gland). Cowper's gland suspensory ligament vas deferens spermatic cord internal oblique muscle cremaster muscle corpus cavernosum penis corpus cavernosum urethroe lans Figure 10-31. Urogenital system of a mole mammal (man). A, semidiogrammatlc system as seen from below (or in front); B, lateral view of bladder region showing interrelationships. The embryological development of the male system is in- dicated in the above description and in the previous account of the kidney. Not mentioned are other remnants of the nephric ducts, the appendix of the epididymis and the par- adidymis (Figure 10-32). MuUerian ducts are rudimentary in the male. The ante- rior end remains as the hydatid appendix of the testis, while a bit of the midline tubule, where it enters the urogential sinus, remains as the prostatic utriculus. Mammals characteristically have the testes in a scrotum outside the body cavity. The process of descent into the scrotum in man involves movement posteriorly (toward the caudal end) along the line of the genital ridge and between the peritoneum (lining of the body cavity) and the body musculature (Figure 10-33). This movement continues cau- dally, then across the posterior wall of the body cavity, and out through the muscular body wall at the inguinal canal (Figure 10-31). In this emergence from the body cavity the testis is accompanied by an outpocketing of the coelomic lin- ing, the processus vaginalis. The testis carries strands of the appendix epididymis
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Date |
circa 1962 date QS:P,+1962-00-00T00:00:00Z/9,P1480,Q5727902 |
Source | Image from page 336 of "Chordate morphology" (1962) |
Author | Internet Archive Book Images |
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