Features：
1. Adult head and neck, left 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