Respiratory organs may be infolded by plates.Logical formLearned from1 sentences. Respiratory trees may undergo enlargements.Logical formLearned from1 sentences. Respiratory trees may empty water.Logical formLearned from1 sentences. Droplets can be from a respiratory tract of a person.Logical formLearned from1 sentences. A tendency can be to a respiratory system.Logical formLearned from1 sentences. Persons may have a tendency to a respiratory system.Logical formLearned from1 sentences. High altitudes may strain a human respiratory system.Logical formLearned from1 sentences. A color can be due to respiratory failure.Logical formLearned from1 sentences. Respiratory organs can be sickle-shaped.Logical formLearned from1 sentences. Some pairs of respiratory organs may be covered with structures.Logical formLearned from1 sentences. Some divisions may control functions of respiratory systems.Logical formLearned from1 sentences. Droplets may be sprayed from a respiratory tract of persons.Logical formLearned from1 sentences. An infectious disease may attack a respiratory system.Logical formLearned from1 sentences. Fluid may be cough_uped from a respiratory tract.Logical formLearned from1 sentences. A respiratory system of members of a class may consist of a network of tubes.Logical formLearned from1 sentences.