NEET BIOLOGY

Detailed explanation-1: -Simple columnar epithelium lines the stomach and intestines. Pseudostratified columnar epithelium lines portions of the respiratory tract and some of the tubes of the male reproductive tract.

Detailed explanation-2: -The lining of the stomach and intestines in the gastrointestinal tract is made up of simple columnar epithelial cells.

Detailed explanation-3: -In humans, simple columnar epithelium lines most organs of the digestive tract including the stomach, and intestines. Simple columnar epithelium also lines the uterus. The stomach wall, with simple columnar epithelium visible as a lining at the top.

Detailed explanation-4: -The columnar epithelium is composed of a single layer of tall and slender cells. Their free surface have microvilli and are found in the lining of stomach and intestine. It helps in secretion and absorption.

Detailed explanation-5: -Mucosa is your stomach’s inner lining. When your stomach is empty, the mucosa has small ridges (rugae). When your stomach is full, the mucosa expands, and the ridges flatten. Submucosa contains connective tissue, blood vessels, lymph vessels (part of your lymphatic system) and nerve cells.