Features：
1. Adult head and neck, left s face is detachable to expose vertical section and allow observation of whole process
2. Precise anatomical structure: nasal cavity, superior turbinate, middle turbinate, inferior turbinate, oral cavity, tongue, teeth, throat, trachea, etc
3. It can be intubated through nose, mouth and trachea, and the simulated sputum can be sucked out when the operation is correct
4. Tracheotomy care
