tugas 1 kelas IX SBI

answer the following questions briefly
1. Mention at least four of the kidtney diseases and disorders.
2. Why should you drink as much water as yau can?
3. Explain how the kidneys expel waste subtance from the body and keep the salt in balance
4. What makes you think that the lungs, heart, and skin are excretory organs?
5. What happens if the urinary organ do not function property?