The ultrastructure of the midgut epithelium in millipedes (Myriapoda, Diplopoda).

摘要: The midgut epithelia of the millipedes Polyxenus lagurus, Archispirostreptus gigas and Julus scandinavius were analyzed under light transmission electron microscopies. In order to detect proliferation regenerative cells, labeling with BrdU antibodies against phosphohistone H3 employed. A tube-shaped three examined spreads along entire length middle region body. epithelium is composed digestive, secretory cells. digestive cells are responsible for accumulation metals reserve material as well synthesis substances, which then secreted into lumen. secretions types - merocrine, apocrine microapocrine. oval or pear-like shaped do not come contact lumen represent closed type They possess many electron-dense granules (J. scandinavius) electron-lucent vesicles (A. gigas, P. lagurus), accompanied by cisterns rough endoplasmic reticulum. distributed individually among basal regions differentiation occurred in J. A. while these processes observed lagurus. As a result mitotic division one newly formed fulfills role cell, second differentiates cell. We concluded that play unipotent stem