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.

•      Hemoglobin 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 mainly by lungs which remove gaseous impurities like CO2 and kidneys which remove other 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.

                SO BLOOD IS MOST VALUABLE TO SAVE THE PEOPLES

                                            “PLEASE DONATE BLOODS”