Anyone will tell you that the most important part of the ceiling fan is the ceiling fan blades. This is because the blades are its most visible parts, and the blades are the parts because of which the fans provide their cooling. There may be three or four blades on the fans depending on the design. The blades are made quite aerodynamic so that they can have a better throw of air. Also, the blades are the easiest parts of the fan to replace in case the need arises.