Which of the following is a long, narrow tube that connects the stomach to the large intestine in the abdomen?

The small intestine is a long, narrow tube that connects the stomach to the large intestine in the abdomen. 

It is essential to the digestive process because it absorbs nutrients and minerals from partially digested food that passes through it.

The duodenum, jejunum, and ileum are the three major divisions of the small intestine. 

The first and tiniest segment of the small intestine, the duodenum, is in charge of receiving partially digested food from the stomach as well as bile and digestive enzymes from the liver and pancreas.

The principal site for nutritional absorption is the jejunum, which is the second portion of the small intestine. Villi and microvilli, which are millions of tiny finger-like projections that line the walls of the jejunum, significantly enhance the surface area that is available for nutrient absorption.

The last part of the small intestine, the ileum, absorbs whatever nutrients that are still present as well as vitamin B12 and bile salts. Additionally, it aids in the movement of toxins from the digestive tract into the large intestine.