Complex multicellular organisms use specialized organs, such as kidneys, lungs, and skin, to perform excretion. These organs filter metabolic wastes from the blood or body fluids and eliminate them from the body through various mechanisms, such as urine production, exhalation of gases, and secretion through sweat glands.
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Complex multicellular organisms, including animals, perform excretion through specialized excretory organs. In animals, the kidneys are prominent excretory organs responsible for filtering blood, removing metabolic waste products like urea and excess ions, and concentrating them into urine. The urine then travels through the urinary system, including ureters, to be expelled through the urethra. Other excretory organs, like the skin and lungs, contribute to waste removal. These organs help maintain homeostasis by regulating the internal environment, ensuring the elimination of nitrogenous wastes, and balancing water and ion levels in the body.