Final answer:
Microvilli are wave-like indentations of the cell surface that increase the surface area of the cell. They are found in cells lining the small intestine and greatly enhance absorption.
Step-by-step explanation:
Microvilli are wave-like indentations of the cell surface that are part of the plasma membrane. They increase the surface area of the cell and are found in cells that specialize in absorption, such as those lining the small intestine.
Microvilli are smaller than villi and are cylindrical extensions of the plasma membrane supported by microfilaments. They greatly enhance absorption by expanding the surface area of the plasma membrane.