higher human biology blood typing. abo blood types four main groups in humans; a b ab o
TRANSCRIPT
Higher Human Biology
Blood Typing
ABO Blood TypesFour main groups in humans;
A
B
AB
O
They are categorised by the presence or absence of two types of antigen on the surface of a person’s red blood cells.
Remember an antigen is a protein that is found on the surface of a pathogen and which is unique to that particular pathogen. An antigen is recognised by the body as non-self (foreign)
Antibodies are present in blood plasma.
Blood Group
A B AB O
Antigen on red blood cells
A antigens B antigens Both A and B antigens
Neither A nor B antigens
Antibodies in blood plasma
Anti-B antibodies
Anti-A antibodies
Neither anti –A nor anti-B antibodies
Both anti-A and anti B antibodies
From the table we can see that certain blood types are not compatible
This can lead to agglutination (clumping) of red blood cells.
