Development of the future respiratory system before birth.
D000818:Animals; D002245:Carbon Dioxide; D003964:Diaphragm / Q000502:physiology; D004285:Dogs; D005260:Female; D005323:Fetal Monitoring; D005333:Fetus / Q000502:physiology*; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D008168:Lung / Q000033:anatomy & histology / Q000196:embryology; D009068:Movement; D009929:Organ Size; D011247:Pregnancy; D012119:Respiration; D012137:Respiratory System / Q000196:embryology*
D002245:Carbon Dioxide