Question

villi are small structures that contain tiny blood vessels. villi have very thin walls. small nutrient particles can cross the villis 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 small intestine. the small intestine 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 stomach. the stomach is where most of the nutrient particles are absorbed into the blood.

Explanation:

The text states that villi are for nutrient absorption. The small intestine is the main site of nutrient absorption in the digestive system. The mouth mainly starts digestion (mechanical and some chemical, like starch in saliva). The stomach mainly digests proteins (mechanical churning and chemical with gastric juices) and has limited absorption (like some water, alcohol).

Answer:

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