1. The ducts are lined by a single layer of columnar epithelium . 2. This kind of epithelium is therefore described as pseudostratified columnar epithelium . 3. The lining of these paired, compound, tubuloalveloar glands is simple columnar epithelium . 4. The surface of the mucous membrane is covered by a single layer of columnar epithelium . 5. The zona columnaris is the upper half of the canal and is lined by simple columnar epithelium . 6. The adult worms occupy a membrane-bound portion of columnar epithelium , living as intramulticellular parasites. 7. The columnar epithelium ascending the esophagus from the stomach has subsequently become known as Barrett's oesophagus. 8. It is composed of non-keratinized, stratified squamous epithelium with goblet cells, and also stratified columnar epithelium . 9. In such cases, cyst is then lined with a pseudo stratified cilliated columnar epithelium or respiratory type of epithelium. 10. They constitute a simple columnar epithelium , as they form a single layer of cells and are taller than their width.
