→ Basophils secrete inflammatory mediators, such as histamine and serotonin and prevent blood clotting by separating heparin → Erythroblastosis foetalis may result when foetus in Rh positive and mother is Rh negative → Atherosclerosis is often referred as arteriosclerosis → Person with blood group AB can donate blood to person with blood group AB only, but can receive blood from person with blood group A, B, AB or O