Interesting Facts About Different Types of Blood Groups

Blood is a body fluid present in humans which assists the body in transporting essential nutrients and oxygen to the cell. It accounts for almost 7% of total human body weight. An average adult has around 5 liters of blood in their body. Blood composes of red blood cells (RBC), white blood cells (WBC), plasma and platelets.

Types of Blood Groups

Although the components of blood are same but not everyone’s blood is alike. There are eight different types of blood group depending on the antigens present in them. Blood group is decided by the genes that we inherit from our parents. There are four main blood groups A, B, AB & O. Now these groups are either RhD negative or RhD positive.

Types of Blood Group

  • Group A –  A antigen on red cells and B antibody in the plasma.
  • Group B – B antigen on red cells and A antibody in the plasma.
  • Group AB – Both A and B antigens on red cells but neither A nor B antibody in the plasma.
  • Group O –  Neither A nor B antigens on red cells but both A and B antibody are in the plasma.

Individuals with type O RhD negative blood are termed as universal donor and individuals with type AB RhD positive blood as universal recipient. Though this fact is only partially true. Often the body does not accept the blood because of anti-A and anti-B antibodies in the blood which causes reactions in the body due to foreign blood type transfusion.

Diet based on Blood Type

Although it may sound a little bizarre but diet can be planned and done per one’s blood type. Doctors encourage to eat or avoid food items depending on individual’s blood type.

  • Type A: more of vegetarian diet suits them. The type A people flourish on soy proteins, whole grains, organic vegetable and some mild exercise.
  • Type B: they have tolerant digestive system and can liberally enjoy low fat dairy products and meat, though they should avoid wheat, corn and lentils, and should exercise moderately.
  • Type AB: they have a quiet sensitive digestive system. They should consume more of seafood and dairy produce but avoid meat, beef, chicken and pork. Calming exercise is key to their fitness.
  • Type O: their digestive tracts are strong. Lean meat, poultry and seafood is good for their metabolism though they should avoid grains, bread and legumes and exercise vigorously.

Rarest Blood Type

The rarest blood type in the world is Rh-Null. It is fewer than 1 in 1000. Rh-null lacks any antigens in the Rh system. There are only 9 known Rh-null donors in world right now. And people with Rh-null cannot receive blood from any other blood type making it the rarest and expensive blood type.


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