Q165 / 180 · AIIMS 2017 · Zoology
The figure shows different human tissues labelled as $\mathrm{A}$ to $\mathrm{D}$. Which option gives the correct identification of the label, its location and one feature?


- AD-Unicellular glandular epithelium, goblet cells, secrete saliva
- BB-Squamous epithelium, walls of blood vessels, form a diffusion boundary
- CA-Cuboidal epithelium, ducts of glands secretion and absorption
- Correct answerDC-Columnar epithelium, lining of stomach, secretion and absorption
Solution
The given figure $\mathrm{A}$ is squamous epithelium, found in walls of blood vessels and air sacs of lungs and is involved in functions like forming a diffusion layer. B is cuboidal epithelium, found in ducts of glands and tubular parts of nephrons of kidney and its main functions are secretion and absorption. $\mathrm{C}$ is columnar epithelium, found in lining of stomach and intestine and helps in secretion and absorption. D is ciliated columnar epithelium, present in inner surface of hollow organs like bronchioles and Fallopian tubes and helps to move particles or mucus in a specific direction over the epithelium.
Hence, the correct answer is option: 'D'.