Inhalation
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2008-06-07T16:59:19Z
Straight Edge PXK
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Reverted edits by [[Special:Contributions/76.179.46.92|76.179.46.92]] to last version by DarkAudit ([[WP:HG|huggle]])
{{otheruses4|the biological phenomenon|TCP/IP packet sniffing|Packet sniffer}}
'''Inhalation''' (also known as '''inspiration''') is the movement of air from the external environment, through the air ways, and into the [[alveoli]].
Inhalation begins with the onset of contraction of the [[diaphragm (anatomy)|diaphragm]], which results in expansion of the [[intrapleural space]] and an increase in negative pressure according to [[Boyle's Law]]. This negative pressure generates airflow because of the pressure difference between the atmosphere and alveolus. Air enters, inflating the lung through either the [[nose]] or the [[mouth]] into the [[pharynx]] ([[throat]]) and [[Vertebrate trachea|trachea]] before entering the alveoli.
Other muscles that can be involved in inhalation include<ref>{{GeorgiaPhysiology|4/4ch2/s4ch2_10}}</ref>:
* [[External intercostal muscles]]
* [[Scalene muscles]]
* [[Sternocleidomastoid muscle]]
* [[Trapezius muscle]]
==See also==
{{Wiktionarypar|inhalation|sniffing}}
* [[Inhalant]] - Psychoactive drugs consumed through inhalation
* [[Respiratory system]]
* [[Ventilation (physiology)]]
==References==
<references/>
{{Respiratory physiology}}
[[Category:Respiration]]
[[da:Inhalation]]
[[de:Inhalieren]]
[[eo:Inhalo]]
[[nl:Inademing]]
[[no:Innånding]]
[[pl:Inhalacja]]
[[simple:Inhalation]]
[[sv:Inandning]]
[[zh:吸入]]
[[pt:Inspiração]]