The Video lecture from Nutrition (F.Sc. First Year Biology) covers the structure and function of digestive system in Hydra which possesses sac like digestive system with tentacles, nematocysts, gastrovascular cavity and gastrodermis as major digestive organs. 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