Changes

: To [[Breathing|breath ]] the lungs [[lung]]s must be able to take in new [[air ]] and release the old [[air]].: When the lungs [[lung]]s take in [[air ]] this is called [[Inhale|inhalation]].: When the lungs get rid of old air this is called [[Exhale|exhalation]].

: To [[inhale ]] the [[diaphragm contracts ]] [[contract]]s and goes down while the [[Intercostal Muscle|intercostal muscles ]] [[contract ]] pulling the [[Rig Cage|ribs ]] upwards and outwards.: To [[exhale ]] the [[diaphragm ]] relaxes and goes up while the [[Intercostal Muscle|intercostal muscles ]] relax allowing the [[Rig Cage|ribs ]] to go down and inward.