This video lecture from Homeostasis (F.Sc. second year Biology) covers: How concentration of excretory product happens during urine formation? Kidney as osmoregulatory organ in the body i.e. controlling the water balance in the body with the help of hormones. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.