Evolution. Special hemoglobin helped swim bladders give fish diversity a lift.
Pennisi
Elizabeth
E
D000400:Air Sacs / Q000098:blood supply / Q000502:physiology*; D000818:Animals; D044822:Biodiversity; D005075:Biological Evolution; D002196:Capillaries / Q000502:physiology; D005399:Fishes / Q000033:anatomy & histology / Q000502:physiology*; D006454:Hemoglobins / Q000737:chemistry / Q000378:metabolism*; D010100:Oxygen / Q000502:physiology*
D006454:Hemoglobins; D010100:Oxygen