Multiple choice

The inner surface of the large intestine is

  1. lined by muscular tissue

  2. provided with epithelial tissue

  3. lined by both epithelial and muscular tissue

  4. lined by all four layers
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The inner surface of the large intestine, like the entire digestive tract, is lined by epithelial tissue. This is specifically simple columnar epithelium with numerous goblet cells that secrete mucus to protect the intestinal wall and lubricate passage of contents. The muscular tissue lies beneath this epithelial layer in the submucosa and muscularis externa.

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