Final answer:
The type of epithelial tissue found in the lumen of the intestine is simple columnar epithelial tissue.
Step-by-step explanation:
The type of epithelial tissue found in the lumen of the intestine is simple columnar epithelial tissue.
Simple columnar epithelium is made up of a single layer of tall, rectangular cells. The nucleus is closer to the base of the cell, and the free surface of the columnar cells have microvilli to increase the surface area for absorption.
The small intestine is lined with simple columnar epithelial tissue, which secretes digestive enzymes and absorbs the products of digestion.