00:01
In this answer we are going to see about a method which is used to determine the blood group of a person whether it is a, b, o or a .v, or whether it is rh positive or negative.
00:22
Based on the type of antigens which are present on the surface of the red blood cells, blood groups can be classified.
00:33
Into a, b, a, b and o types and based on the presence of the rh antigen on the surface of the blood cells, it can be classified into rh positive or rh negative.
00:52
So if the antigen is present, it is rh positive and if the rh antigen is absent, it is rh negative.
00:58
In case of a blood group, there is a antigen present in the surface of the rbc and anti b antibodies in the plasma.
01:11
In case of b blood group, there is b antigen which is present in the surface of the red blood cells and anti -a antibodies in the plasma.
01:24
In case of a -b blood group, both a and b antigens are present in the surface of the rbcs and it does not have any antibodies in the plasma.
01:39
So antibodies are absent.
01:41
In case of o blood group, there are no antigens on the surface of the rbcs, while the plasma contains anti -a as well as antibodies.
01:59
So the slide method can be used for determining the blood group of a person where three drops of blood is taken in a slide.
02:12
The first drop is mixed with anti -a antiserum, the second drop is mixed with anti -b antiserum and the third drop is mixed with anti -rhti antiserum...