Why are Villi present in the intestine and not in the stomach ?

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Q. Why are Villi present in the intestine and not in the stomach ?

Tamil Nadu DgeTamil Nadu HSC First Year (DGE) Board 2026Subjective· 2mImportance★★★★★

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Villi are finger-like projections that greatly increase surface area for absorption; since the small intestine is the principal site of nutrient absorption (while the stomach mainly digests), villi are present in the intestine and absent from the stomach.

The inner lining of the small intestine is covered with thousands of tiny, finger-like projections called villi (and each villus cell bears even smaller microvilli, forming a "brush border"). This dramatically increases the internal surface area of the intestine, which is essential because the small intestine is where the final products of digestion — simple sugars, amino acids, fatty acids, glycerol, vitamins, minerals, and water — are actually absorbed into the blood and lymph. Each villus also contains a network of blood capillaries and a central lymph vessel (lacteal) to carry away the absorbed nutrients.

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Same / Similar Concept — real previous-year questions on the same or a closely similar concept, not this exact question.

CBSE 2025Set ANNUAL1 markMCQ
$Q. In small intestine active absorption occurs in case of:$
(a) Amino acids
(b) Na+
(c) Glucose
(d) All the above
›Reveal solutionSolution
Amino acids, sodium ions and glucose are each absorbed across the intestinal mucosa by active transport, which requires ATP and often works via coupled (symport) mechanisms.

Absorption in the small intestine occurs by several mechanisms — passive diffusion, facilitated diffusion, and active transport. For the substances listed:

Na+ ions are actively pumped out of the intestinal epithelial cells into blood by the Na+/K+-ATPase pump on the basal membrane, and are also taken up at the apical membrane via active/co-transport mechanisms, creating the gradient that drives absorption of other nutrients. …
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CBSE 2020Set ANNUAL1 markMCQ
$Q. Assertion (A): Large intestine also shows the presence of villi like small intestine. Reason (R): Absorption of water takes place in large intestine.$
(a) Both (A) and (R) are true and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true but (R) is not the correct explanation of (A).
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.
›Reveal solutionSolution
The large intestine lacks villi (villi are a small-intestine feature for nutrient absorption); it does, however, absorb water from the undigested residue — so (A) is false but (R) is true, option (d).

Villi are finger-like projections of the mucosa that dramatically increase surface area for nutrient absorption, and they are a defining structural feature of the SMALL intestine (along with microvilli on each epithelial cell). The large intestine's mucosa is comparatively smooth, without villi, because its main jobs are different from the small intestine's:

Assertion (A), "Large intestine also shows the presence of villi like small intestine," is FALSE — the large intestine does not possess villi. …
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Q.Why are Villi present in the intestine and not in the stomach ?

Concept understanding — Absorption of Digested Products

Q.Why are Villi present in the intestine and not in the stomach ?

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