The attached video confers the basic anatomy and histology associated with the respiratory system. Using colorful images, it talks about the bronchial tree and compares the histological layers of different parts of respiratory system. Timeline: 00:00 introduction 00:53 Anatomy of trachea 02:24 walls of trachea 03:44 bifurcatio tracheae 04:26 Bronchial Tree 07:39 the alveolar tree 08:58 the walls of respiratory system