The small intestine, also called the small bowel, is a vital part of the digestive tract. It is where most of our digestion takes place, and it helps us to break down food and absorb nutrients.
The small intestine is located under the stomach and is surrounded by the large intestine. After receiving food from the stomach, it secretes digestive juices to break the food down. Friendly bacteria living in the small intestine also help with this process.
After the food is broken down, the small intestine helps to extract water and nutrients from it. The nutrients are then absorbed into the bloodstream so they can be used throughout the body.
The muscles of the small intestine also work to move food along the gastrointestinal tract. Anything left over from the small intestine is passed to the large intestine where it is further processed before being eliminated from the body.
The small intestine is linked up to our nervous system, and it even has its own branch of neural pathways. It relies on a complex network of neurotransmitters and hormones to carry out all of its duties and to communicate with other parts of the body as well.
Another function of the small intestine is to help protect our body from pathogens. It plays a role in immunity, serving as a barrier to keep out harmful bacteria that may have made their way into the digestive tract.
Further Reading:
Small Intestine Structure, Function, & Health Tips
Vectoring Digestion for Improved Health
Gastrointestinal System Structure, Function, & Health Tips