Ergastic substances are non-living substances found inside cells and tissues of living organisms. These substances include various types of inclusions, such as crystals, starch, oils, gums, tannins, and resins, among others. Their primary functions vary by substance, from acting as a storage facility for nutrients to providing structural support and protection to cells. Ergastic substances are present in all types of cells, including plant and animal cells, and their presence and amount vary depending on the type of organism and its specific biological needs.
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