Investigation of different ontogenetic stages of Raillietiella sp. (Pentastomida: Cephalobaenida): the midgut in nutrition and digestion
| Autor: | Gabriele Thomas, Susanne Stender-Seidel, W. Böckeler |
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| Rok vydání: | 1999 |
| Předmět: |
Male
digestive system chemistry.chemical_compound biology.animal parasitic diseases Animals Arthropods Pentastomida Cockroach General Veterinary biology Glycogen fungi Embryogenesis Embryo Midgut General Medicine Anatomy biology.organism_classification Cell biology Infectious Diseases chemistry Insect Science Larva Ultrastructure Parasitology Digestion Female Digestive System |
| Zdroj: | Parasitology research. 85(4) |
| ISSN: | 0932-0113 |
| Popis: | The midgut of Raillietiella sp. was investigated ultrastructurally in different ontogenetic stages from the intermediate (cockroach) and the final host (small lizards). In the embryo the midgut anlage is an accumulation of cells filled with glycogen granules. During embryogenesis the cells organize and form a narrow tube. During postembryogenesis the contribution of the midgut to the alimentary tract rises considerably from the first larva to the adult parasites. In all stages the midgut is not divided into zones; however, two cell types (crystal and noncrystal cells) are distinguishable. Digestion takes place extracellularly. The main storage product of the midgut cells and the surrounding muscle cells is glycogen. A slight cyclic course of the digestive process is discernible. |
| Databáze: | OpenAIRE |
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