If pressure from outside the lungs causes atelectasis, your doctor will treat the cause of the pressure. For example, if the cause is a tumor or fluid buildup, your doctor will remove the tumor or fluid. This will allow your lung to fully expand. Atelectasis Caused by a Blockage
Pilus. Definition. noun, plural: pili. (microbiology) Short, filamentous projection on a bacterial cell, used not for motility but for adhering to other bacterial cell (especially for mating) or to animal cells. Supplement. Bacterial pili are involved in cell adhesion.
Confidence votes 183. Pili are the fine hair like projections present on the bacterial cell surface. Only one or few pili are present on the cell surface. They are genetically determined, and are used for attachment in case of pathogenic bacteria.ili are the fine hair like projections present on the bacterial cell surface. Only one or few pili are present on the cell surface.