Epithelial

Trachea in cross section

Locate first the epithelial lining of its lumen. Under X40, verify the three different cell types that are present in the pseudostratified columnar epithelium. Identify the nucleus of the goblet cells. The cytoplasm of the goblet cell is foamy. Can you recognize the cilia projecting into the lumen? Revise the ultrastructure of a motile cilium. See demonstration electron micrographs on cilia, goblet cells and columnar cells.