Respiratory disease Stimulator -- extra and intrathoracic ---from nose, oropharynx ---bronchi---cough reflex such as 1. inhalation of foreign material 2. inflammation of respiratory tract 3. bleeding of respiratory tract 4. tumor of respiratory tractRespiratory disease Stimulator --- extra and intrathoracic --- from nose,oropharynx --- bronchi --- cough reflex. such as: 1.inhalation of foreign material 2.inflammation of respiratory tract 3.bleeding of respiratory tract 4.tumor of respiratory tract