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.
Above: a pilus projecting from the surface of a Gram negative bacterial cell. 'Pilus' is Latin for 'hair' (plural pili) and describes not so much hair-like bacterial appendages, but thin rod-like appendages that some bacteria have.bove: a pilus projecting from the surface of a Gram negative bacterial cell. 'Pilus' is Latin for 'hair' (plural pili) and describes not so much hair-like bacterial appendages, but thin rod-like appendages that some bacteria have.