Name any three excretory organs and also the substances excreted by the named organs.

Each organ with the excretory substance:

1. Kidney: Removes urea, uric acid, creatinine, ammonia, excess water, and some drugs.
2. Lungs: Removes carbon dioxide that is produced by the cells during cellular respiration.
3. Skin (Sweat glands): Removes salt (sodium chloride), water and traces of urea.