Ventilation (physiology)
Ventilation (physiology)
Ventilation (pronounced: ven-ti-lay-shun) is a term used in Physiology to describe the process of air movement into and out of the Lungs. This process is crucial for Respiration, as it allows for the exchange of gases, specifically oxygen and carbon dioxide, between the lungs and the atmosphere.
Etymology
The term "ventilation" originates from the Latin word "ventilare", which means "to fan" or "to wind". This is a fitting description of the process, as it involves the movement of air, much like a fan or wind.
Process
Ventilation involves two main stages: inspiration (or inhalation) and expiration (or exhalation). During inspiration, the Diaphragm and intercostal muscles contract, increasing the volume of the thoracic cavity and decreasing the pressure inside the lungs. This pressure difference causes air to flow into the lungs. During expiration, the diaphragm and intercostal muscles relax, decreasing the volume of the thoracic cavity and increasing the pressure inside the lungs. This causes air to flow out of the lungs.
Related Terms
- Respiration: The process of gas exchange in the body, which includes ventilation, diffusion, and perfusion.
- Diaphragm: The primary muscle involved in ventilation.
- Lungs: The organs where ventilation and gas exchange occur.
- Inhalation: The process of drawing air into the lungs, also known as inspiration.
- Exhalation: The process of expelling air from the lungs, also known as expiration.
See Also
External links
- Medical encyclopedia article on Ventilation (physiology)
- Wikipedia's article - Ventilation (physiology)
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