The tissue described as simple squamous epithelium is found in which organ?

The tissue described as simple squamous epithelium is found in which organ?

• A. Trachea
• B. Bladder
• C. Esophagus
• D. Skin

Answer: (C)

Simple squamous epithelium is a single layer of flat cells that forms a very thin, smooth surface, ideal for rapid diffusion and filtration. Because of this, you find it where exchanges occur quickly, such as the walls of the lungs (alveoli) and the lining of blood vessels (endothelium), as well as the serous membranes lining body cavities. In contrast, the trachea has a lining of pseudostratified ciliated columnar epithelium with goblet cells; the bladder is lined by transitional epithelium that can stretch; the esophagus is lined by stratified squamous epithelium to protect against abrasion; and the skin has keratinized stratified squamous epithelium for protection. So among the listed organs, simple squamous epithelium would be found in organs like lungs or blood vessels, not in the esophagus (which is stratified squamous).

Simple squamous epithelium is a single layer of flat cells that forms a very thin, smooth surface, ideal for rapid diffusion and filtration. Because of this, you find it where exchanges occur quickly, such as the walls of the lungs (alveoli) and the lining of blood vessels (endothelium), as well as the serous membranes lining body cavities.

In contrast, the trachea has a lining of pseudostratified ciliated columnar epithelium with goblet cells; the bladder is lined by transitional epithelium that can stretch; the esophagus is lined by stratified squamous epithelium to protect against abrasion; and the skin has keratinized stratified squamous epithelium for protection. So among the listed organs, simple squamous epithelium would be found in organs like lungs or blood vessels, not in the esophagus (which is stratified squamous).