This video lecture from Homeostasis (F.Sc. second year Biology) covers: Osmoregulation - keeping water balance in the body cells. Cells behaving differently in different osmotic environment due to solute concentrations. i.e isotonic, hypotonic and hypertonic. 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.