title: So much, so little.
mesh_terms: D000818:Animals; D001800:Blood Specimen Collection / Q000379:methods*; D002196:Capillaries; D004285:Dogs; D006801:Humans; D008168:Lung / Q000098:blood supply; D010100:Oxygen / Q000097:blood; D011651:Pulmonary Artery; D012119:Respiration; D012121:Respiration, Artificial; D014680:Veins
chemical_list: D010100:Oxygen