Gas exchange in gill, skin, and lung breathing.
D000222:Adaptation, Physiological; D000818:Animals; D005075:Biological Evolution; D001775:Blood Circulation; D001783:Blood Flow Velocity; D005399:Fishes / Q000502:physiology; D005880:Gills / Q000502:physiology*; D006454:Hemoglobins / Q000032:analysis; D008168:Lung / Q000502:physiology*; D010100:Oxygen / Q000097:blood; D010101:Oxygen Consumption; D012119:Respiration; D012879:Skin Physiological Phenomena
D006454:Hemoglobins; D010100:Oxygen