A route can be through respiratory passages.Logical formLearned from1 sentences. Symptoms may be followed by respiratory failure.Logical formLearned from1 sentences. Respiratory passages can be constricted.Logical formLearned from1 sentences. Helium may move through respiratory passages.Logical formLearned from1 sentences. A bacterial disease may attack a respiratory system.Logical formLearned from1 sentences. A respiratory system may handle a workload.Logical formLearned from1 sentences. Onset of symptoms may be followed by a development of respiratory distress.Logical formLearned from1 sentences. Passages may pertain-to a respiratory system.Logical formLearned from1 sentences. A membrane can be in passages of a respiratory system.Logical formLearned from1 sentences. An illness may be preceded by signs of respiratory infection.Logical formLearned from1 sentences. A respiratory tract may be characterised by a cough.Logical formLearned from1 sentences. Infectious disease may pertain-to an upper respiratory tract.Logical formLearned from1 sentences. Mucus can be from respiratory passages.Logical formLearned from1 sentences. Larvaes may block a respiratory tract.Logical formLearned from1 sentences. Failure can be in a respiratory system.Logical formLearned from1 sentences.