16. In humans, waste products in the form of soluble nitrogenous compounds are excreted out by which present in kidneys. a. Lungs b. Nephrons c. Heart d. Intestine
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Explanation:
The kidneys remove waste products called urea from the blood through tiny filtering units called nephrons. There are about one million nephrons in each kidney. Each nephron consists of a ball formed of small blood capillaries, called a glomerulus, and a small tube called a renal tubule.
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nephrons is the correct answer
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