ISSN:
1432-234X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary The development of cells of the olfactory organ in young (parr and smolt) and adult Baltic sea trout is investigated from an ecological point of view. A theory on cell dynamics is presented. Blastema cells are basal cells which divide into goblet cells, primary receptors and primary supporting cells. The latter cell type reminds one of undifferentiated fibroblasts. In the indifferent epithelium the primary supporting cells then differentiate into ciliated nonsensory cells, whereas in the sensory epithelium they form ciliated and nonciliated supporting cells. The primary receptors develop into spindle receptors, and these into rod receptors. This dimorphism of supporting cells and receptors and the grouping of them is discussed. Indications on aging of the epithelium are presented. The epithelial cells are arranged in zones. Mainly in the basal zone there is a supply of lymphoid wandering cells and macrophages some of which move into other zones and phagocytize dead or degenerating cells. Dead cells are also extruded into the olfactory chamber. This occurs especially during the initial secondary folding of the primary olfactory laminae. Different aspects on ecological adaptation of cells and structures are presented. Baltic sea trout have a dynamic cell population and secretion adapted for life both in river and sea.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00283126
