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.or example, one function of pili is adhesion to surfaces-thus bacteria inside the human intestine may produce pili in order to adhere to the host's cells and only swarmer cells may produce them. Swarmer cells are dispersal stages, they swim off to find new surfaces to colonise.