Where is the example of stratified columnar epithelium found?

Where is the example of stratified columnar epithelium found?

• A. Skin
• B. Small intestine
• C. Salivary glands
• D. Sweat glands

Answer: (C)

Stratified columnar epithelium appears in tissues where ducts need a durable, protective lining while still accommodating secretions. The classic example is the large ducts of salivary glands, where the duct lining can show tall, columnar cells arranged in multiple layers. This differs from skin, which is stratified squamous; the small intestine, which has simple tall columnar cells specialized for absorption; and sweat glands, whose ducts are typically stratified cuboidal rather than columnar. So the salivary gland ducts best fit this epithelial type.

Stratified columnar epithelium appears in tissues where ducts need a durable, protective lining while still accommodating secretions. The classic example is the large ducts of salivary glands, where the duct lining can show tall, columnar cells arranged in multiple layers. This differs from skin, which is stratified squamous; the small intestine, which has simple tall columnar cells specialized for absorption; and sweat glands, whose ducts are typically stratified cuboidal rather than columnar. So the salivary gland ducts best fit this epithelial type.