Quick Question – Why do we cough?
A cough is one of the major symptoms of Covid-19 and a common feature of any respiratory infection but why do we cough and what actually happens in the body during a cough? Coughs are annoying and irritating, both for the person suffering and for those around them (I seem to be as intolerant of listening to coughing as I am of hearing people chew!) They are however a protective mechanism designed to remove foreign particles from the windpipe and lungs. Larger objects such as food that’s gone down the wrong way and smaller particles such as dust, germs and mucous are all expelled from the body through coughing. The lining of our airways contains specialised cells called goblet cells which produce mucous to keep our airways moist and to trap dirt and germs. Alongside them are ciliated cells which have hundreds of tiny, microscopic legs at their surface which wave, waft and move the mucous and trapped particles back up the airways. During an infection we may have a dry cough where little or …