Hemolysis (or haemolysis)—from the Greek Hemo-, Greek Αἷμα meaning blood, -lysis, meaning to break open—is the breaking open of red blood cells and the release of hemoglobin into the surrounding fluid (plasma, in vivo). In vivo haemolysis In vivo (inside the body) haemolysis, which can be caused by a large number of conditions, can lead to anemia. Anemias caused by in vivo haemolysis are collectively called haemolytic anemias. In vitro haemolysis In vitro (outsi… (More on Hemolysis)