File:Keibel Mall 2 530.jpg

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Fig. 530. Human embryo of 2.6 mm greatest length

with 13-14 pairs of primitive segments. (Embryo Pfannenstiel III, from the collection of Professor Pfannenstiel; slide 12, row 1, section 5.) X 182.

On the right side (left in the figure) the section passes through the forming cranial wall of the 14th primitive segment, on the left through the caudal wall of the 13th segment. On the right (left in the figure) it cuts the nephrogenic cord. A comparison with the right side of Fig. 528 shows at once that the primitive segment stalk is greatly enlarged, the enlargement being due to the pronephric anlage. The anlage and the primitive segment stalk together form the nephrogenic cord. On the left side (right in the figure) the section passes through a point where the nephrogenic cord, delimited otherwise as on the right side, is fused with the lateral plate and receives a cleft of the coelom. The rete peri-intestinale is well developed, since we are here in the region of the art. umbilicalis. Between the aorta and the rete there is on the right side of the figure another ramus intestinalis.


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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 27) Embryology Keibel Mall 2 530.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Keibel_Mall_2_530.jpg

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