Residual body
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The residual body is a former food cavity within a cell , more precisely a food vacuole in primeval beings ( protists ), which no longer contains any further degradable material. The residual bodies are also referred to as residual bodies , defecation vacuoles , residual vacuoles or telolysosomes .
They are excreted from the cell through various processes, for example via exocytosis , a type of substance transport out of the cell. The vesicles located in the cytosol fuse and “fuse” with the cell membrane, releasing the substances stored in them.
The simplest route is excretion by fusing the membrane of the residual body with the cell membrane in the reverse of phagocytosis , in which particles or smaller cells are actively taken up into a single eukaryotic cell. In cells with a hardened cell cortex ( pellicula ), there is a separate cell extractor ( cytopyge ) for this process .
Individual evidence
- ↑ Keyword “Residualkörper.” In: Herder-Lexikon der Biologie. Spectrum Akademischer Verlag GmbH, Heidelberg 2003. ISBN 3-8274-0354-5
- ↑ Monica Hirsch-Kauffmann, Manfred Schweiger: Biology for medical professionals and natural scientists , 6th edition, Thieme, 2006, p. 404, ISBN 9783137065067
- ^ A b Klaus Hausmann, Norbert Hülsmann, Renate Radek: Protistology , 3rd edition, Schweizerbart, 2003, pp. 236-238, ISBN 3-510-65208-8
- ^ Klaus Hausmann, Norbert Hülsmann: Unicellular Eukaryota. In: Westheide, Rieger (ed.): Special Zoology. Part 1. Protozoa and invertebrates. Gustav Fischer, Stuttgart / Jena 1997, 2004, ISBN 3-8274-1482-2 ; P. 11.