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[1] [2] Vacuoles are essentially enclosed compartments which are filled with water containing inorganic and organic molecules including enzymes in solution, though in certain cases they may contain solids which have been engulfed. Vacuoles are formed by the fusion of multiple membrane vesicles and are effectively just larger forms of these. [3]
In Paramecium, which has one of the most complex contractile vacuoles, the vacuole is surrounded by several canals, which absorb water by osmosis from the cytoplasm. After the canals fill with water, the water is pumped into the vacuole. When the vacuole is full, it expels the water through a pore in the cytoplasm which can be opened and closed ...
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Valonia ventricosa has a coenocytic structure with multiple nuclei and chloroplasts. [5] This organism possesses a large central vacuole that is multilobular in structure (lobules radiating from a central spheroid region).
In step two a lysosome with an active hydrolytic enzyme comes into the pictures as the food vacuole moves away from the plasma membrane. Step three consists of the lysosome fusing with the food vacuole and hydrolytic enzymes entering the food vacuole. In the final step, step four, hydrolytic enzymes digest the food particles. [5]
Diagram of an animal cell with only the vacuole labelled: Date: 15 April 2009: Source: File:Biological_cell.svg: Author: MesserWoland and Szczepan1990 modified by smartse: Permission (Reusing this file) Own work, copyleft: Multi-license with GFDL and Creative Commons CC-BY-SA-2.5 and older versions (2.0 and 1.0) Other versions: File:Biological ...
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Vacuolization is the formation of vacuoles or vacuole-like structures, within or adjacent to cells. Perinuclear vacuolization of epidermal keratinocytes is most likely inconsequential when not observed in combination with other pathologic findings.