What are Villi?
Villi are small, finger-like projections that line the walls of the small intestine. They are tiny structures that increase the surface area of the small intestine, allowing for better absorption of nutrients.

Location of Villi
Villi are located in the small intestine, specifically in the lining of the mucosa. They are found in the jejunum and ileum, which are the middle and lower parts of the small intestine, respectively.

Function of Villi
- Increased Surface Area: The main function of villi is to increase the surface area of the small intestine. This increased surface area allows for more efficient absorption of nutrients.
- Absorption of Nutrients: Villi contain blood vessels and lacteals (lymphatic vessels) that help in the absorption of nutrients such as carbohydrates, proteins, fats, vitamins, and minerals from the digested food.
- Secretion of Enzymes: Villi secrete enzymes that aid in the digestion of food. These enzymes help break down carbohydrates, proteins, and fats into smaller molecules that can be absorbed by the body.
- Protection: Villi help protect the lining of the small intestine from damage by forming a barrier between the intestinal contents and the cells of the mucosa.
- Movement: Villi have a slight movement that helps mix the digested food with digestive juices, further aiding in the absorption process.
In conclusion, villi play a crucial role in the process of digestion and absorption of nutrients in the small intestine. Their unique structure and functions make them essential for maintaining a healthy digestive system.