What are the tiny fingers in small intestine called?

The tiny finger-like structures in the small intestine are called villi. Villi are microscopic, finger-shaped projections that line the small intestine and are responsible for absorbing nutrients from the food that passes through. Villi increase the surface area of the small intestine, which allows for more efficient nutrient absorption. Each villus is covered in even smaller structures called microvilli, which further increase the absorption surface area.