1. One out of every 10 people admitted in a hospital needs blood.
2. Plasma, which comprises 55% of blood fluid, is mostly water (90% by volume)
3. Blood makes up about 7% of your body’s weight.
4. Some animals, such as crustaceans and mollusks, use hemocyanin to carry oxygen, instead of hemoglobin.
5. 31 per cent of men and 28 per cent of women have high blood pressure.
6. Giving blood will not decrease your strength.
7. The blood cells present in blood are mainly red blood cells and white blood cells, including leukocytes and platelets.
8. Insects and some molluscs use a fluid called hemolymph instead of blood, the difference being that hemolymph is not contained in a closed circulatory system.
9. Blood fights against infection and help heal wounds, keeping you healthy.
10. The kidneys filter over 400 gallons of blood each day.
