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  • Title: Cytochemistry and ultrastructure of the prenatal porcine adrenal medulla.
    Author: Stadnicka A, Van Wynsberghe D.
    Journal: Z Mikrosk Anat Forsch; 1982; 96(1):103-12. PubMed ID: 6179311.
    Abstract:
    The ultrastructure and cytochemistry of fetal porcine adrenal medullae have been studied at 60, 80, and 100 days of gestation. Adrenal medullae from fetuses at 60 days of pregnancy consisted of norepinephrine cells only. Some cells containing chromaffin granules were seen in the process of mitosis. A few epinephrine cells were present in the outer medullary zone at 80 days at pregnancy, their number increasing by the 100 day of pregnancy. Chromaffin cells containing both norepinephrine and epinephrine storing granules were also present at 80 and 100 days of gestation. Norepinephrine and epinephrine specific granular vesicles in the fetal adrenal medullary cells were smaller than those reported for the adult pig. The general ultrastructural characteristics of the porcine fetal adrenal medulla were similar to those reported for prenatal adrenal medulla of other species.
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