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Excretory System

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<strong>Excretory</strong> system<br />

Nitrogenous Waste<br />

• Ammonia จะมีเฉพาะ N และ H มีสูตรโมเลกุล NH 3<br />

• Urea มีสูตรโมเลกุล NH 2 CONH 2<br />

• Uric acid มีสูตรโมเลกุล C 5 O 3 N 4 H 4

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