Inhalation 485575 217777289 2008-06-07T16:59:19Z Straight Edge PXK 4493678 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]]