(i) Study the given figure of respiratory passage carefully . Parts are labelled as a,b,c,d and e. Label these parts .
(ii) How many secondary bronchi are there in right and left human lung ?
(iii) What is the approximatge length width of human trachea (wind pipe) ?
(iv) What is the role of epiglottis?
(v) In which body cavity the lungs are located ?