1Human anatomy and physiology
Which sequence lists the organs of the digestive tract in the order food passes through them?
Answer: A.
The digestive tract is a single continuous tube: mouth → pharynx → esophagus → stomach → small intestine → large intestine → rectum → anus. Food is chewed in the mouth, carried down the esophagus, churned with acid in the stomach, digested and absorbed in the small intestine, and what remains is dried into feces in the large intestine. Naming what happens at each stop makes the order hard to scramble: nothing can be absorbed before it has been digested, and nothing can be dried before it has been absorbed.
Why the others are wrong
B — swaps the esophagus and stomach; the esophagus is the tube that carries swallowed food from the pharynx down to the stomach. C — swaps the two intestines; chyme leaving the stomach enters the small intestine first, and only the undigested residue reaches the large intestine. D — places the small intestine before the stomach; food must be churned into chyme in the stomach before the small intestine can work on it.