Large wrinkle-like folds in the stomach lining, present when the stomach is empty, that allow for expansion when the stomach is filling are called ________.

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Large wrinkle-like folds in the stomach lining are called rugae. They allow for expansion of the stomach when it is filling. Villi are small finger-like projections in the small intestine that increase surface area for absorption. Haustra are the pouches or sacs in the large intestine that are formed by its muscular wall. Microvilli are even smaller projections on the surface of cells in the small intestine that further increase surface area for absorption.

Large Wrinkle-Like Folds in the Stomach Lining, Present When the Stomach