Question

villi are small structures that contain tiny blood vessels. villi have very thin walls. small nutrient particles can cross the villi’s thin walls and move into the blood vessels. these particles are then carried in the blood throughout the body. which part of the digestive system has villi? the stomach. the stomach is where most of the nutrient particles are absorbed into the blood. the mouth. the mouth is where most of the nutrient particles are absorbed into the blood. the small intestine. the small intestine is where most of the nutrient particles are absorbed into the blood.

Explanation:

To determine which part of the digestive system has villi, we analyze the function of villi (absorbing nutrients into blood vessels) and the roles of each organ:

• The stomach primarily digests food (e.g., proteins) but does not absorb most nutrients.
• The mouth is for mechanical and initial chemical digestion, not nutrient absorption.
• The small intestine has villi (and microvilli) to maximize surface area for absorbing most nutrients into the bloodstream, matching the villi’s function described.

Answer:

The small intestine. The small intestine is where most of the nutrient particles are absorbed into the blood.