describe urine formation
Please refer to the following link.
https://www.meritnation.com/ask-answer/question/please-explain-the-procees-of-urine-formation-and-working-of/life-processes/5576086
https://www.meritnation.com/ask-answer/question/please-explain-the-procees-of-urine-formation-and-working-of/life-processes/5576086