Вопрос № 236597 - Английский язык

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Cough is one of the commonest symptoms in childhood as well as at any age. It is important to understand that coughing is quite a normal act, as it is one of the body’s ways of protecting the bronchial tubes and lungs. Any irritation of the bronchial tree or the trachea excites a reflex one cough. There are two main causes of this irritation. Firstly, it may be due to mucus which comes down the back of the nose. The cough reflex is to prevent the entering of mucus into the bronchial tubes. Secondly, infection may cause inflammation of the trachea and this produces the cough reflex.
Many children who have a persistent cough have no disease in their chest. When the doctor examines such a child with his stethoscope there is no abnormality to be heard. However, in some children coughing is due to impairment in the chest itself. The cough is an expression of the normal defences of the chest, but in this case the bronchial tubes are inflamed.  
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Выберите словосочетание, не соответствующее тематической группе, к которой принадлежат остальные словосочетания.

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