MICROANATOMY

Detailed explanation-1: -The epithelial cells that line your small intestine have thousands of microvilli that absorb nutrients from the food you eat and protect your body from intestinal bacteria.

Detailed explanation-2: -Functions of Simple Columnar Epithelia These long cells are specially adapted for secretion and absorption.

Detailed explanation-3: -They are simple columnar epithelial cells and play important roles in nutrient absorption (e.g., ions, water, sugar, peptides, and lipids) and in secreting immunoglobulins.