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What are blood groups?

Updated: 8/10/2023
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7y ago

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AB+ and AB- are the most rare

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Lupe Hahn

Lvl 13
2y ago
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13y ago

Blood is composed of cells suspended in a liquid.

The liquid portion is the plasma, from which therapeutic fractions and derivatives are made.

Suspended in the plasma are three types of cells:

Red cells: These carry Oxygen

White cells: These fight infection

Platelets: These stop wounds bleeding

The most common type of grouping is the ABO grouping. Red Blood Cells have a protein coat on their surface which distinguishes them. According to this blood is divided into four groups:

A (A protein is present), B (B protein is present),AB (AB protein is present)and O ( No protein is present).

There are subtypes under this grouping ( listed as A1, A2, A1B or A2B…) some of which are quite rare.

Apart from this there is another protein which plays an important part in the grouping of blood. This is called the Rh factor. If this is present, the particular blood type is called positive. If it is absent, it is called negative. Thus we have the following broad categories:

A1 Negative

A1 Positive

A1B Negative

A1B Positive

A2 Negative

A2 Positive

A2B Negative

A2B Positive

B Negative

B Positive

O Negative

O Positive

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