Respiration and control of breathing in birds.
D000818:Animals; D001717:Birds / Q000502:physiology*; D002245:Carbon Dioxide; D002628:Chemoreceptor Cells / Q000502:physiology; D002645:Chickens; D004372:Ducks; D012119:Respiration; D012137:Respiratory System / Q000033:anatomy & histology
D002245:Carbon Dioxide