Which term describes the length of the digestive tract that includes both the small and large intestines?

The term that encompasses the entire length of the digestive tract, specifically referring to both the small and large intestines, is "intestine." This term is used to describe the continuous passage that extends from the end of the stomach to the rectum, including parts such as the jejunum and ileum in the small intestine and the cecum, colon, and rectum in the large intestine. Understanding this helps clarify the roles and structures of the digestive system as a whole.

The other choices represent specific parts of the digestive system rather than the entirety of the intestinal tract. The pylorus is the section of the stomach that connects to the duodenum, the duodenum refers only to the first part of the small intestine, and the stomach is the organ that precedes the intestines, thus not encompassing the length of the digestive tract in question.