Species variation in gas exchange.
D000717:Anatomy, Comparative; D000818:Animals; D001001:Anura; D005075:Biological Evolution; D005399:Fishes; D006801:Humans; D007313:Insecta; D010828:Physiology, Comparative; D012119:Respiration / Q000502:physiology*; D012137:Respiratory System / Q000033:anatomy & histology*; D013045:Species Specificity