(a)[3]
State the feature seen in Fig. 3.1 that shows the structure at the centre of the image is a bronchus, and include any other visible features that confirm this identification.
(b)[2]
Identify the structure labelled J in Fig. 3.1, and state the visible evidence in Fig. 3.1 that backs up your answer.
(c)[2]
Fig. 3.1 labels ciliated epithelium that includes goblet cells and ciliated epithelial cells. Outline how goblet cells and cilia function together to keep lung tissue healthy.