And this S shaped colon section is known as the sigmoid colon. So the colon can be divided into our ascending, transverse, descending and sigmoid colon. And the function of this colon of the large intestine is to basically absorb water ions such as calcium and sodium ions and vitamins that have not been absorbed by other parts of the body. 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.