Question: what is the major structural difference between cilia and microvilli?
Answer: Cilia are longer and wider than microvilli, with a length of 10µm and a diameter of 0.2µm. Microvilli are smaller, with a length of only 1µm and a diameter of 0.1µm. It's a little like comparing pencils (cilia) to needles (microvilli), only on a much smaller scale.