Suction
Suction is the force that a partial vacuum exerts upon a solid, liquid, or a gas.[1][better source needed] Removing air from a space results in a lowered pressure, which can cause fluids to enter the space or produce adhesion.
When the pressure in one part of a system is reduced relative to another, the fluid in the higher pressure region will exert a force relative to the region of lowered pressure. Pressure reduction may be static, as in a piston and cylinder arrangement, or dynamic, as in the case of a vacuum cleaner when air flow results in a reduced pressure region.
When animals breathe, the diaphragm and muscles around the rib cage cause a change of volume in the lungs. The increased volume of the chest cavity decreases the pressure inside, creating an imbalance with the ambient air pressure, resulting in suction.
See also
 | Look up suction in Wiktionary, the free dictionary. |
- Pump
- Vacuum pump
- Suction devices used in medicine
- Implosion
- Suction cup
- Suction cupping
References
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