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Biology
OpenStudy (anonymous):

Which of these compounds is excreted by the skin? A. carbon dioxide B. urea C. oxygen D. ammonia

OpenStudy (lanre):

B) Excretion takes place with the help of our body systems. In the urinary system, the kidneys work to rid the body of water and toxins. They also eliminate electrolytes and nitrogen compounds. Like the kidneys, the skin helps the body excrete nitrogen, water, and electrolyte wastes from the body. The sweat excreted from the skin contains wastes such as lactic acid and urea, which are waste products of nitrogenous compound.

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