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Cytodifferentiation in the Pars Distalis of the Pituitary Gland in the Fetal and Juvenile Mink, Mustela vison
Author(s) -
Weman Birgitta
Publication year - 1974
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.1974.tb00184.x
Subject(s) - biology , mink , primordium , pituitary gland , ontogeny , pars intermedia , juvenile , embryo , fetus , anatomy , zoology , endocrinology , pregnancy , microbiology and biotechnology , hormone , ecology , biochemistry , genetics , gene
Abstract Hypophysial tissue of mink ( Mustela vison ) embryos, newborn young and kits aged 1 day to 27 weeks was examined by light and electron microscopy. Among the embryos five different ontogenetic stages were distinguished. It appears that the primordium of the pituitary gland differentiates in early embryonic life. Several types of glandular cells containing variable amounts of granular material were recognizable by the time of birth. The role of the granular cells and the origin of the lumina in the pars distalis are speculated upon (in the Discussion).