Also known as the colon, the large intestine is the final part of the digestive system. It is a muscular tube that connects the small intestine to the rectum and anus.
The large intestine is responsible for processing any leftover indigestible material from your food, absorbing water and electrolytes, and changing the liquid waste that has been moving through the digestive tract into stool which can be eliminated from the body.
While the large intestine absorbs water, forms stool, and moves that stool out through the anus, bacteria living in the colon also feed on the waste as it is processed. This helps to break it down further while also producing important vitamins through the process of fermentation. The friendly bacteria in the colon produce things like vitamin K and B vitamins, which are then absorbed into the body where they perform vital functions.
Further Reading:
Large Intestine Function, Issues, and Health Tips
Vectoring Digestion for Better Wellness
Gastrointestinal System Structure, Function, & Health Tips