Cilia is the thin hair-like projection from particular cells such as those in the respiratory tract that sweep in unison and assist in sweeping away fluids and particles. Some single-celled organisms even sweep in rhythm. Stereocilia is any of the long soft microvilli that seemingly resemble cilia. They are related to microvilli, and some consider stereocilia to be a variant of microvilli. The function of cilia in human and animal bodies safeguards people from germs by impelling microbes and mucus out of the airways. There are also cilia accountable for moving ova down the fallopian tube in females. The stereocilia‚Äôs distinguishing attributes are their length and lack of motility, and they are organelles hair cells found on the cochlea, ductus deferens, epididymis, and inner ear. Stereocilia respond more to fluid motion or alterations in fluid pressure in animals for many functions, particularly hearing.