Final answer:
The villus is not a part of the excretory system. It is a finger-like projection in the small intestine that aids in nutrient absorption.
Step-by-step explanation:
The villus is not a part of the excretory system. The excretory system is responsible for the elimination of metabolic wastes from the body. It includes organs such as the kidneys, ureters, bladder, and urethra. The villus, on the other hand, is a finger-like projection found in the small intestine that functions in the absorption of nutrients from digested food.
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