How Many Blood Group In Human Body

The term human blood group systems is defined by international society of blood transfusion as systems in the human species where cell surface antigens in particular those on blood cells are controlled at a single gene locus or by two or more very closely linked homologous genes with little or no observable recombination between them and include the common abo and rh rhesus antigen systems as well as many others. The adult human body comprises of 4 to 6 litres of blood which is roughly about 7 to 8 percentage of the total body weight. They are known red blood corpuscles leukocytes and thrombocytes.

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For those who want to know how many types of blood groups in human body.

How many blood group in human body. Golden blood is the nickname for rh null the world s rarest blood type. There are four major blood groups determined by the presence or absence of two antigens a and b on the surface of red blood cells. Red blood cells constitute 45 of blood. In addition to the a and b antigens there is a protein called the rh factor which can be either present or absent creating the 8 most common blood types a a b b o o ab ab.

These blood cells which are also called corpuscles or formed elements consist of erythrocytes red blood. Blood accounts for 7 of the human body weight with an average density around 1060 kg m 3 very close to pure water s density of 1000 kg m 3. Fewer than 50 people have it worldwide. A total of 36 human blood group systems and 346 antigens are now recognized by the international society of blood transfusion isbt.

Blood is a combination of red and white blood cells and platelets in a watery liquid form known as plasma. Blood constitutes different type of corpuscles in it. They determine someone s blood type a b ab and o with or null denoting rhd status for suitability in blood transfusion. Within these groups there are a.

The amount of blood in the human body is generally equivalent to 7 percent of body weight. The average amount of blood in your body is an estimate because it can depend on how much you weigh your. About 45 of the blood consists of cells while the remaining 55 comprises of plasma. Abo is the best known system for grouping blood types though there are other methods.

Thirty nine major human systems are identified as of july 2019. Until 1961 when it was first identified in an aboriginal australian woman doctors. There are four major categories within the abo group. It is composed of plasma and different types of cells.

Plasma is about 54 3 and leukocytes of 0 7. A b o and ab. The two most important blood group systems are abo and rh. The average adult has a blood volume of roughly 5 litres 11 us pt or 1 3 gallons which is composed of plasma and several kinds of cells.