This medical animation opens with a 20 month old white male infant. The sagittal anatomy fades in to reveal the structures of the mouth to the main right and left bronchus, including the lungs. A ballooned endotracheal tube dissolves into place in the trachea with the ballooned tip extending to the level of the carina just above the split to the left and right main bronchus. A schematic single bellow ventilator fades on in the background attached to the ET tube. Once in place, the bellow begins to pump up and down.