The model is designed and produced on the basis of normal human anatomy from the shape to the main parts. The upper chest wall and head bones are made of fiberglass, and the face, nose, mouth, tongue, epiglottis, glottis, trachea, bronchi, esophagus, lung, stomach, and upper chest are made of soft and elastic rubber plastic. ; Equipped with a movable jaw that can open and close the mouth; the movement of the neck joint can make the head tilt back up to 80 degrees. Lean forward up to 15 degrees. There are light signals indicating the intubation site. Th