[The structure of the bovine mammary gland during the dry period with special reference to the process of involution. 2. Electron microscopic studies].
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 secondary 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 alveoli. The phase of the colostrogenesis is characterised by the enlargement of the cell organelles and the reappearance of vacuoles.
Heinz
M
M
Veterinär-Anatomisches Institut, Universität Leipzig.
Michel
G
G
D000818:Animals; D002417:Cattle / Q000033:anatomy & histology* / Q000502:physiology; D005260:Female; D008321:Mammary Glands, Animal / Q000502:physiology / Q000648:ultrastructure*; D008854:Microscopy, Electron
Zum Bau der Milchdrüse des Rindes während der Trockenstehperiode unter besonderer Berücksichtigung der Involutionsprozesse. 2. Elektronenmikroskopische Untersuchungen.