cilia

• small hair-like structures
• stick out from the cell in some animal cells
• have a outermsmbrane and a ring of nine pairs of protein microtubules inside with a pair of microtubules in the middle
• the microtubules allow them to move which is used by the cell to move substances along the cell surface
• they are present in the trachea to move mucus away from the lungs and in fallopian tubes to move egg cells from the ovary to the uterus. both examples of mobile cilia which beat in a rhythmic manner creating a current that causes fluids or objects adjacent to the cell to move
• you can get stationary cilia which are present on the surface of many cells and have have an important function in sensory organs such as the nose