ShareRespiratory Infections The airways are lined with tiny brush like hairs, called cilia. The cilia sweep out mucus and ...

If your mucus is gray or black... …you likely inhaled dark-colored particles, like smoke from a fire or heavy exhaust. Regular smokers can also blow out darker mucus because of the tar or other toxic ...

Biological cells often possess thin, hair-like protrusions on their surface known as cilia, which serve various functions ranging from movement to ...

Biological cells often possess thin, hair-like protrusions on their surface known as cilia, which serve various functions ...

Researchers have found that some cells form new multicellular structures with functions that defy their original biological ...

Scientists from Germany and Italy have uncovered details of the protective layer that surrounds the fine protrusions of cells ...