FUNCTION INTRODUCTION
1. Obvious anatomical structure，easy to operate. Multiple emergency care operations can be performed.
2. Pupils: one dilated, one contracted
3. Airway management, respiratory maintenance techniques such as endotracheal intubation, oropharynx, nasopharynx
and LMA can be carried out.
4. Practice the Sellick maneuver
5. Simple CPR can be performed
