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function of vacuole
stores waste/excess salts, water, ions and nutrients, provides turgidity, contains pigment in petal cells to attract pollinating insects
structure of vacuole
single membrane called a tonoplast, permanent structure in plants, temporary structure in animals
when are vacuoles found in animal cells
formed during phagocytosis or act as contractile vesicles during osmoregulation
turgor pressure
when a plant takes up water by osmosis, it will enter the vacuole and the tonoplast will push against the cell membrane which pushes against the cell wall which will push back with an equal and opposite force