- Dr Colin Tidy
The respiratory system contains the lungs, windpipe and diaphragm, among other structures and organs. You'll have learned all about this in biology classes at school, but since then many just taking breathing for granted. However, a cough or wheeze could be a sign of worse things to come.
Expert advice on the signs of a chest infection, and whether you should worry that your cough or cold could be something more serious.