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Zum Bau der Milchdrüse des Rindes während der Trockenstehperiode unter besonderer Berücksichtigung der Involutionsprozesse: 2. Elektronenmikroskopische Untersuchungen
Author(s) -
Heinz Margit,
Michel G.
Publication year - 1991
Publication title -
anatomia, histologia, embryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 35
eISSN - 1439-0264
pISSN - 0340-2096
DOI - 10.1111/j.1439-0264.1991.tb00296.x
Subject(s) - myoepithelial cell , vacuole , organelle , cytoplasm , ultrastructure , involution (esoterism) , biology , microbiology and biotechnology , electron microscope , chemistry , anatomy , immunology , immunohistochemistry , physics , consciousness , neuroscience , optics
Summary Morphology of the bovine mammary gland during the nonlacting period According to the electron microscopic investigations the most evident sign of the phase of the active involution of the mammary gland in cattle is the occurrence of different great vacuoles with a diffuse content in the cytoplasma of the secretory cells till the 30th day after the beginning of the dry period. Secretory cells which go over in the rest phase show a great reduction of the cell organelles and many filaments and secundary lysosomes or residual bodies. One can observe many macrophages and lymphocytes in the partly enlarged intercellular rooms between the secretory cells and the myoepithelial cells. The myoepithelial cells are adapting to the changing forms of alveoles. The phase of the colostrogenesis is characterised by the enlargement of the cell organelles and the reappearence of vacuoles.