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www.disabled-world.com/calculators-charts/blood-chart.php

Blood Types (Groups) A blood type (also called a blood group) is defined as the classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs). A series of related blood types constitutes a blood group system, such as the Rh or ABO system.

www.quora.com/What-are-the-different-human-blood-groups-and-types

There are four main blood groups (types of blood): A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means your blood group can be one of the eig...

en.wikipedia.org/wiki/Blood_type

A blood type (also called a blood group) is a classification of blood, ... Blood types are inherited and represent contributions from both parents. A total of 36 human blood group systems and 346 antigens are now recognized by the International Society of Blood Transfusion (ISBT).

www.medicalnewstoday.com/articles/218285.php

The ABO system is the most familiar way of grouping human blood types. ... ABO and the most common blood types. The ABO blood group system is used to determine the different types of antigens in ...

www.redcrossblood.org/donate-blood/blood-types.html?icid=rdrt-blood-types&imed=...

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. 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-).

www.scienceabc.com/humans/humans-different-blood-types.html

Humans have another type of marker that characterizes their blood type in even greater detail. The Rh or the ‘Rhesus’ factor is a group of more than 40 antigens that also cover the surface of an RBC.

readanddigest.com/know-your-blood-type-different-types-of-blood-groups

What is blood made of and what are the different types of blood groups? 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. ... Know your blood type – Different types of blood groups ... that determines a person’s blood Type. Whatever may be the blood group of the ...

www.smithsonianmag.com/science-nature/the-mystery-of-human-blood-types-86993838

The Mystery of Human Blood Types ... The ABO blood group, as the blood types are collectively known, are ancient. ... like the MN blood group, humans don’t produce antibodies against the antigens.

www.livescience.com/36559-common-blood-type-donation.html

In general, the rarest blood type is AB-negative and the most common is O-positive. Here's a breakdown of the most rare and common blood types by ethnicity, according to the American Red Cross. A ...

www2.palomar.edu/anthro/blood/ABO_system.htm

All humans and many other primates can be typed for the ABO blood group. There are four principal types: A, B, AB, and O. There are two antigens and two antibodies that are mostly responsible for the ABO types.