. Answer the following questions in brief.
1. What will happer if a person does not excrete properly
2. Why is a nephron considered the structural and functional unit of the kidney?
3. What is the function of sphincter muscles guarding the urethra?
4. Why does urine smell strongly if allowed to stand?
for class 7 ICSE BORED
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math is easy sub so don't play study well
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