if you mean the "respratory system" that is the cycle of breathing but if you are inquireing the "resperation system" im not really sure...
lungs.
respiration system and circulation system
what is one of the products of respiration gotten rid of bythe excretory system
during cellular respiration
Respiratory system
lung
Respiration
Respiration need transportation of respiratory gases. This is done by circulation system
Anacrobic respiration
To die
Through exhaling
through bilateral nervous system