Anatomical system that has as its parts the organs involved in respiration (breathing).
hog:0001725
hog:0000280 oral regionhog:0000287 olfactory organhog:0000310 lung - swim bladderhog:0000393 respiratory tracthog:0000394 pleurahog:0000462 pharynxhog:0000713 diaphragmhog:0001214 gilltao:0000272