Ciliated cells are specialized cells that have tiny hair-like structures called cilia on their surface. These cilia help move substances across the cell's surface, playing a crucial role in various bodily functions. For example, in the respiratory system, ciliated cells help clear mucus and trapped particles from the airways, keeping the lungs clean. These cells are found in several parts of the body, including the trachea and fallopian tubes. In the trachea, they help transport mucus out of the lungs, while in the fallopian tubes, they assist in moving the egg from the ovary to the uterus.