The correct answer is the small intestine. To determine this, you can recall the basic process of digestion. After food is chewed and swallowed, it enters the stomach, where it is broken down further by stomach acid and enzymes. However, the main absorption of nutrients occurs in the small intestine. This is because the small intestine has a large surface area, thanks to its lining covered in tiny finger-like projections called villi. These villi increase the absorption capacity of the small intestine, allowing nutrients from food to be efficiently absorbed into the bloodstream and transported throughout the body. Hence, the small intestine is the primary site of nutrient absorption in the digestive system.
