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.
Bacteria are prokaryotic cells. Simple in structure, they may have both pili and flagella. The flagella are used for movement, but the pili have many functions: adhesion, reproduction, and movement as well. The flagella and pili are similar in that they are both composed of A) elastin. B) lipids. C) microfibrin. D) proteins.