02 Systematic aorta carries 1. oxygenated blood 2. lymph 3. de oxygenated blood 4. mixed blood

04 The substance that prevents clotting of blood vessels is 1. haemoglobin 2. heparin 3. thyroxin 4. pepsin

06 Hemophilia is a .......... 1. contagious decease 2. genetic disorder 3. hereditary 4. 2 and 3