Villi are tiny, finger-like projections found in the lining of the small intestine. Their main job is to increase the surface area for absorption, allowing nutrients from the food we eat to enter the bloodstream more efficiently. Each villus is covered with even smaller hair-like structures called microvilli, which further enhance this absorption process. These structures play a crucial role in digestion and nutrition. When we consume food, the villi help absorb essential vitamins, minerals, and other nutrients, ensuring our bodies get what they need to function properly. Without villi, our ability to absorb nutrients would be significantly reduced, leading to potential health issues.