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  • Title: Morphological observations on the mesonephros in the postnatal opossum, Didelphis virginiana.
    Author: Krause WJ, Cutts JH, Leeson CR.
    Journal: J Anat; 1979 Sep; 129(Pt 2):377-97. PubMed ID: 500493.
    Abstract:
    The mesonephros of the opossum persists for 3-4 weeks into the postnatal period. Based on our observations of its structure, and the vital dye experiments of others, it appears that the opossum mesonephros is functional during the first 10 days of the postnatal period. The mesonephros of the newborn opossum consists of 35-45 nephron units which are structurally very similar to metanephric nephrons except that they lack a loop of Henle. By the end of the first postnatal week, regression which proceeds in a craniocaudal direction, is observed. By the end of the second week most nephrons show some signs of regression. The regressing mesonephric nephrons are replaced by connective tissue.
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