File:Keibel Mall 2 614.jpg

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Fig. 614. Transverse section of the testis of a human embryo of 70 mm head-foot length

(Embryo R. Meyer 267; slide 35, row 3, section 3, from the collection of Professor R. Meyer, Berlin.) X50.

Solid testis cords have appeared in the testis and are connected by anastomoses at their middle and at their outer ends. The majority of them have already acquired an investment of young connective tissue. Their inner ends unite at the mesorchium to form the rete blastema and their connective-tissue sheaths form a connective-tissue boundary around the blastema, the first indication of the mediastinum testis. Two distinct layers may be recognized in the tunica albuginea, an outer one of connective tissue and an inner one composed of what are still indifferent epithelial cells. At the boundary between the two are twigs of the ascending branch of the a. spermatica int.

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Felix W. The development of the urinogenital organs. In Keibel F. and Mall FP. Manual of Human Embryology II. (1912) J. B. Lippincott Company, Philadelphia. pp 752-979.

XIX Development of the Urinogenital Organs: Excretory Glands and their Ducts | Reproductive Glands and their Duct | Urogenital Union | External Genitalia | Figures | Literature
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Cite this page: Hill, M.A. (2024, April 22) Embryology Keibel Mall 2 614.jpg. Retrieved from

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