In DRSABCD, A = Airway. This short video demonstrates the difference in opening the airway between infants and children. Why is this so important? Firstly, the airway - this is a passageway through which air passes in and out of the lungs. The trachea (windpipe) is the tube that connects your nose and mouth to your lungs. For babies, the airway is soft and narrow. If your baby is unconscious due to illness or injury, her muscles and normal reflexes are inactive, so if her head falls backward or