Surface Tension and Pulmonary Surfactant

Surface tension and pulmonary surfactant are one of the tricky topics. This video just made it easy. It explains the phenomenon of surface tension and emphasis on the role of surfactant in reducing surface tension at the air/liquid interface in the lung. Timeline: 00:10 introduction 00:25 what is surface tension? 03:33 Laplace law and alveolar surface tension 06:13 what is surfactant? 08:16 pulmonary surfactant 09:40 consequences of pulmonary surfactant