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Ventilation - Anatomy & Physiology (view source)
Revision as of 10:40, 21 August 2008
, 10:40, 21 August 2008→Inspiration
*During Inspiration, the pressure within the [[Pleural cavity and membranes - Anatomy & Physiology|Pleural Cavity]] drops to less than the pressure of the external environment.
*During Inspiration, the pressure within the [[Pleural cavity and membranes - Anatomy & Physiology|Pleural Cavity]] drops to less than the pressure of the external environment.
*This is achieved by increasing the [[Lungs - Anatomy & Physiology|lung]] volume, brought about by the Inspiratory Muscles:
*This is achieved by increasing the [[Lungs - Anatomy & Physiology|lung]] volume, brought about by the Inspiratory Muscles:
**[[Diaphragm - Anatomy & Physiology|Diaphragm]] - contracts - causing the dome to flatten and moe caudally.
**[[Diaphragm - Anatomy & Physiology|Diaphragm]] - contracts - causing the dome to flatten and move caudally.
**[[Ribs and Sternum - Anatomy & Physiology#Thoracic Musculature|Intercostal muscles]] - External Intercostal Muscles contract - causing the [[Ribs and Sternum - Anatomy & Physiology|ribs]] to be pulled outwards cranially.
**[[Ribs and Sternum - Anatomy & Physiology#Thoracic Musculature|Intercostal muscles]] - External Intercostal Muscles contract - causing the [[Ribs and Sternum - Anatomy & Physiology|ribs]] to be pulled outwards cranially.