And in our colon we also have specialized types of bacterial cells such as E. Coli that are actually capable of producing important types of vitamins and minerals such as vitamin K and vitamin B twelve. Now, the final portion of our large intestine is known as the rectum. And the purpose of the rectum is to basically receive and store the feces that comes from our colon. Now, the feces is basically all the different types of materials and molecules and cells that have not been digested and have not been absorbed by our body by the large intestine and a small intestine and other organs in our body. So the rectum is the location where feces is stored before being excreted out of the body and the walls of the rectum can basically expand to fit more feces as necessary. Now the final section is our anus and the anus is basically this opening that is able to open and close to allow that feces to exit our body.