Editing Gastrointestinal tract (section)

=====Large intestine=====
{{Main|Large intestine}}

The [[large intestine]] forms an arch starting at the [[cecum]] and ending at the [[rectum]] and [[anal canal]]. It also includes the [[appendix (anatomy)|appendix]], which is attached to the [[cecum]]. Its length is about 1.5 m, and the area of the mucosa in an adult human is about {{convert|2|m2|abbr=on}}.<ref name="ReferenceA" /> The longest part of the large intestine is the [[Large intestine#Structure|colon]] whose main function is to absorb water and salts.<ref name="Terms">{{cite web|title=definition colon|url=https://www.cancer.gov/publications/dictionaries/cancer-terms/def/colon|website=www.cancer.gov|access-date=24 January 2025|language=en|date=2 February 2011}}</ref>

The large intestine begins at the cecum, where the [[Appendix (anatomy)|appendix]] is located. This is also the start of the colon as the [[ascending colon]] in the back wall of the abdomen. At the [[right colic flexure]] ([[Liver|hepatic]] flexure) (the flexed portion of the ascending and [[transverse colon]]) it runs across the abdomen in the transverse colon, passing below the diaphragm. At the [[left colic flexure]] ([[Spleen|splenic]] flexure) the flexed portion of the transverse and [[descending colon]], it descends down the left side of the abdomen.
It reaches the [[sigmoid colon]] which is a loop of the colon closest to the rectum and continues to the rectum and [[anal canal]].