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The correct answer is option 1: Liver.
The liver is responsible for converting glycogen, the stored form of glucose, into glucose. This process, known as glycogenolysis, occurs when the body needs a quick source of energy. The liver also plays a crucial role in purifying the blood by filtering out toxins, metabolizing drugs, and breaking down old red blood cells. Additionally, the liver is involved in the production and regulation of various substances essential for digestion, metabolism, and immune function.
Alert - correct answer should be option 2: Kidney.
While the liver is responsible for converting glycogen into glucose, it is the kidneys, not the liver, that play a primary role in purifying the blood. The kidneys filter waste products from the blood and regulate the balance of electrolytes and fluids in the body through urine formation.