A complete digestive tract has both a mouth and an anus and the food passes in one direction from the mouth to the anus.

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Quizplus · Accepted Answer

A complete digestive tract, also known as an alimentary canal, is an organized tube-like structure that runs from the mouth to the anus. It includes various organs such as the mouth, pharynx, esophagus, stomach, small intestine, large intestine, rectum, and anus. The food enters through the mouth and passes through these organs in one direction, eventually reaching the anus where the waste products are eliminated from the body.

A Complete Digestive Tract Has Both a Mouth and an Anus