Important Facts about Blood

  • The study of blood is known as Haematology
  • The normal volume of blood in an adult human is 4.7 to 5 litres
  • Haemoglobin is a protein in red blood cells that carries oxygen to other cells in your body; it contains iron which combines with oxygen to give our blood, a red color.
  • Blood is purified by kidneys and lungs. Lungs remove gaseous impurities like CO2 and kidneys remove other water soluble impurities.
  • The drug or chemical which prevents blood from clotting is called anticoagulant.
  • William Harvey was the first scientist to describe accurately how blood is pumped around the body by the heart.
  • Karl Landsteiner classified the bloods of human beings into A, B, AB, and O groups.
  • Rh blood group system was discovered by Karl Landsteiner and A.S. Weiner. Each blood group type may be Rh positive or negative.
  • The most common blood group type is O+ or O positive
  • The normal blood pressure range is 120/80. The top number (120) is known as the systolic number while the bottom number (80) is known as the diastolic number.
  • Blood pressure is measured by an instrument known as sphygmomanometer.

Blood Group - Relation between Parents and Child

 Father's Blood Group
AA or OA, B, AB, OA, B or ABA or O
BA, B, AB, OB or OA, B or ABB or O
ABA, B or ABA, B or ABA, B or ABA or B
OA or OB or OA or BO
 Child's Blood Group