In which of the following parts of the human digestive system is the digestion of food completed?

Small intestine

The correct answer is Option (4) - Small intestine

In the human digestive system, the digestion of food is primarily completed in the: Small intestine

The small intestine is the longest part of the digestive tract and plays a crucial role in the digestion and absorption of nutrients from food. It receives partially digested food from the stomach and continues the process of digestion by breaking down carbohydrates, proteins, and fats into simpler molecules that can be absorbed by the body. Enzymes produced by the pancreas and the small intestine itself aid in this process. The small intestine also absorbs the majority of nutrients, including sugars, amino acids, fatty acids, vitamins, and minerals, into the bloodstream for distribution to cells throughout the body. While digestion begins in the mouth and continues in the stomach, it is in the small intestine where the majority of nutrient absorption and the final stages of digestion occur.