Ergastic Substance
Ergastic substances are non-protoplasm materials found in cells. The living protoplasm of a cell is sometimes called the bioplasm and distinct from the ergastic substances of the cell. The latter are usually organic or inorganic substances that are products of metabolism, and include crystals, oil drops, gums, tannins, resins and other compounds that can aid the organism in defense, maintenance of cellular structure, or just substance storage. Ergastic substances may appear in the protoplasm, in vacuoles, or in the cell wall.
Read more about Ergastic Substance: Carbohydrates, Proteins, Fats and Oils, Crystals
Famous quotes containing the word substance:
“True, I talk of dreams,
Which are the children of an idle brain,
Begot of nothing but vain fantasy,
Which is as thin of substance as the air,
And more inconstant than the wind, who woos
Even now the frozen bosom of the north,
And being angered, puffs away from thence,
Turning his side to the dew-dropping south.”
—William Shakespeare (1564–1616)