Small Intestine Villi: Key Features for Nutrient Absorption & Protection

1. Microvilli: These are tiny, finger-like projections that line the surface of the villi. They increase the surface area of the small intestine, which allows for more efficient absorption of nutrients.

2. Goblet cells: These cells produce mucus, which helps to lubricate the small intestine and protect it from damage. Mucus also helps to trap bacteria and other foreign particles, preventing them from entering the bloodstream.