The human immune system is a very intricate network of cells, signals, and reactions that is strictly regulated in order to ensure that the body can fight off infection without injuring its own tissues
Washington [US], September 17 (ANI): Alveoli are microscopic air sacs in our lungs that exchange gases between the air we breathe and our blood. To keep this process running properly, the alveolar epithelial cells create a material called "surfactant," which coats the alveoli like a film. Th