Biology

Ok i have three questions that i can't find anywhere...

1. Carbon dioxide and water are excreted here during exhalation.

2. Structures in the skin which excrete water. salts, and some urea.

3. Removes toxic substances from the blood and converts excess amino acids to urea.

THANKS! :D

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asked by Amber
  1. Carbob dioxide and water are excreated here during exhalation. THE LUNGS

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