Simple columnar epithelial cells with cilia are numerous in the lining of the oviduct, where they are interspersed with secretory cells.

• Examine the thick basement membrane of the epithelium. Notice that the nuclei are located at varying levels throughout the epithelium. Observe the cilia lining the epithelium.

Answer this: How do cilia, sterocilia and microvilli differ structurally and functionally?

Learning about this is not just an academic exercise, rather it has real clinical significance.

• Kartagener’s disease is an inherited disorder involving mutations in the gene for dynein or one of the many other proteins in cilia. All the cilia in such individuals are immotile, leading to infertility and chronic respiratory disorders.

How about pseudostratified and stratified epithelium?