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Substances that can act both as an acid and as a base are called:
Kidneys
Bean-shaped organs that filter waste products from the blood, regulate fluid balance, and maintain electrolyte balance.
Bone Marrow
The soft, spongy tissue inside bones where blood cells are produced.
Stem Cells
Undifferentiated biological cells that can differentiate into specialized cells and can divide to produce more stem cells.
Blood Cells
Cells that circulate in the bloodstream, comprising red blood cells, white blood cells, and platelets.
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