Biology / Bio 0285 · Atom · ~20 seconds
The Central Vacuole
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The central vacuole is a large plant organelle regulating the cell's water content and supporting its expansion without needing new cytoplasm.
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A plant wilts when its central vacuole loses water faster than the soil replaces it, leaving the wall unsupported.
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The vacuole supports the wall through water pressure; losing that water leaves the wall intact but unsupported.