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May 22, 2015

Homework Help: Biology

Posted by Amber on Sunday, February 17, 2008 at 3:37pm.

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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