The Video lecture from Nutrition (F.Sc. First Year Biology) covers the first part of Human Digestive system i.e. Digestion in Oral Cavity. It includes major steps involved in digestion in buccal cavity, three types of salivary glands and peristalsis movement of bolus along the esophagus. 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.