What histological feature would you expect in a section of the esophagus?

• A. Simple columnar epithelium with goblet cells; lamina propria; muscularis mucosae absent.
• B. Stratified squamous non-keratinized epithelium with a thick protective mucosa and submucosal mucus glands; muscularis mucosae present.
• C. Pseudostratified ciliated epithelium with cilia and mucous cells; thick muscularis externa.
• D. Transitional epithelium with distension capability.

Answer: (B)

The esophagus is designed to withstand constant abrasion as food passes through, so its lining is a thick, protective non-keratinized stratified squamous epithelium. This mucosa resists wear from swallowed material. In the submucosa, mucus-secreting glands provide lubrication to reduce friction during swallowing, which is a key feature of the esophagus. A muscularis mucosae layer is present, helping to move the mucosa slightly with peristaltic activity. The combination of stratified squamous epithelium, submucosal mucus glands, and a muscularis mucosae fits the esophagus well. The other options describe epithelia typical of stomach/intestinal lining (simple columnar with goblet cells), respiratory tract (pseudostratified ciliated), or urinary tract (transitional epithelium), which do not match esophageal histology.