They depend on organs in the mouth and chest, such as the esophagus and tongue, to help chew, move food, and perform primary digestive functions. The abdomen also includes the urinary system.

"Ultra-processed foods and higher risk of mouth, throat and esophagus cancers." ScienceDaily. ScienceDaily, 21 November 2023. <www.sciencedaily.com / releases / 2023 / 11 / 231121220959.htm>.

Esophagoscopy involves inserting a tube through the mouth and into the esophagus. It allows doctors to diagnose and treat esophageal conditions. Learn more here.