BLOOD GROUPS-

In R.B.C. on plasmalemma antigen or agglutinogen present form antibodies or agglutinines.

Blood groups are based on antigens.

1.      ABO SYSTEM -

• Discovered by Leindsteiner. O group was discovered by De cestello and sturli.

2.      RH SYSTEM -

• Discovered by Leindsteiner & Winner. Race and Taylor worked in it. Rh factor comes from Rhehsus monkey.
• If Rh factor present Rh positive 97% in India and 80% in world.
• If Rh factor absent Rh negative 3% in India and 20% in world.
• If Rh positive blood is given to Rh negative person, first time no agglutination second time death occur.
• If Rh negative mother is having Rh positive embryo, disease is erythroblastois foetalis (explained by Lavina, Leindsteiner & Winner).