Answer
Cilia are microscopic, hairlike structures whose functions is still unknown. It is believed they serve as antennas for the cell, helping sense its surroundings. Microvilli are extensions of the plasma membrane that help increase the total surface area of the cell.
Work Step by Step
Cilia's true function is still a mystery. However, it is known that they are involved in almost every part of the body, from the ventricles in the brain, to the inner ear, to the kidneys, to some female and male reproductive systems. Among its hairlike structures, the cilia has one primary cilium that is a few micrometers long. The microvilli are very small extensions of the plasma membrane that sometimes congregate around a specific area to form a "brush border." These cells, because of their structure, are usually developed in cells specialized in absorption, such as those in the walls of the intestine and kidney tubules.
