The Video lecture from Gaseous Exchange (F.Sc. First Year Biology) covers the respiratory system of Birds. Birds have an advanced respiratory system as they have high metabolic rate. The major organs involved in birds’ respiration are trachea, bronchi, parabronchi, lungs and air sacs. 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.