The villi in the digestive system is the correct example of exchange surfaces with a large surface area. ❤️ The elongated (long length) axons in neurones help impulses pass along them quickly. These are not exchange surfaces. The flagella of some bacteria allow them to move. These are not exchange surfaces. The ciliated cells lining oviduct have tiny hairs (cilia), which beat regularly to move the egg from the ovary to the uterus. These are not exchange surfaces.