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| Q. |
Which one of the following organs excretes water, fat and various catabolic wastes? |
| A. | Kidney |
| B. | Skin |
| C. | Spleen |
| D. | Salivary glands |
| Answer» A. Kidney | |
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Explanation: The kidneys are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid-base balance, and regulation of blood pressure (via maintaining salt and water balance). They serve the body as a natural filter of the blood, and remove wastes which are diverted to the urinary bladder. |
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