Read the following statements regarding epithelial tissues: (A) Simple squamous epithelium is found in the walls of blood vessels and air sacs of lungs. (B) The epithelium of the proximal convoluted tubule (PCT) of the nephron in the kidney has microvilli. (C) Ciliated epithelium is found in the inner lining of the ducts of salivary glands. (D) Goblet cells of the alimentary canal are examples of unicellular glands.

Step-by-step solution

Statement (A) is correct as simple squamous epithelium forms a diffusion boundary and is found in the walls of blood vessels and air sacs of lungs. Statement (B) is correct because the cuboidal epithelium of the proximal convoluted tubule (PCT) of the nephron has microvilli to increase the surface area for absorption. Statement (C) is incorrect because the inner lining of the ducts of salivary glands is lined by compound epithelium, not ciliated epithelium. Ciliated epithelium is found in hollow organs like bronchi