Function of the Small Intestine

The small intestine is an important organ in our digestive process. It plays a crucial role in distributing nutrients absorbed from food throughout the body. Without it, our body would not be able to obtain the necessary energy and nutrients needed to maintain life.

How does the small intestine work?

The small intestine begins with the duodenum, which connects to the stomach. After food passes through the stomach, it enters the duodenum, where the process of breaking down food begins. The food then moves through the small intestine, where most of the absorption of nutrients occurs.

The walls of the small intestine are covered with intestinal villi, which increase the absorption surface. The villi are connected to blood and lymphatic capillaries, through which nutrients enter the blood and lymph.

Nutrient distribution

The distribution of nutrients absorbed through the walls of the small intestine occurs through different channels. Carbohydrates, broken down into monosaccharides, and proteins, converted into amino acids, are sent through the portal vein to the liver, which stores them and distributes them throughout the body.

Fats, broken down into fatty acids and glycerol, are converted into more digestible fats in the lymphatic system, from where they enter the blood supply.

Function of small intestinal peristalsis

In addition, the small intestine plays an important role in the process of peristalsis, that is, the movements of the intestines that move food along its walls. They move food around and help mix food with gastric juices and digestive enzymes.

Conclusion

The small intestine is an important organ in our digestive process. It ensures the distribution of nutrients throughout the body and also plays an important role in the process of peristalsis. Without it, our body would not be able to obtain the necessary energy and nutrients needed to maintain life.