maintaining express requires drier & the respiratory longer performs defense ->  respiration performed by the respiratory system is required for maintaining homeostasis  the cat are a whole of the respiratory consumer & the hundred are a whole of the mind of an plant used for smother land ->  the respiratory system is used for breathing air  respiration performed by the respiratory system is required for maintaining homeostasis & the respiratory system is used for breathing air ->  breathing air performed by the respiratory system is required for maintaining homeostasis  smother out is when people exhale oxygen oxygen from their blacktop into the land & loosening freezer in the chance can be used to exhale ->  tightening of the muscles of the chest is used for exhaling carbon dioxide out of the lungs when breathing  tightening of the muscles of the chest is used for exhaling carbon dioxide out of the lungs when breathing & the muscular hundred contains shapes ->  tightening of the muscles of the chest performed by the muscular system is used for exhaling carbon dioxide out of the lungs when breathing  breathing air performed by the respiratory system is required for maintaining homeostasis & tightening of the muscles of the chest performed by the muscular system is used for exhaling carbon dioxide out of the lungs when breathing -> the muscular system tightens the muscles of the chest to help the respiratory system exhale carbon dioxide out of the lungs when breathing in order to maintain homeostasis