Blood groups

Blood Groups

Blood Group                                               Antigen                                                          Antibody

1. A                                                             A                                                                    Anti B
2. B                                                             B                                                                     Anti A 
3. AB                                                           AB                                                                 NIL
4. O                                                              NIL                                                        Anti A Anti B       

For Safe Blood Transfusion it's neccessary that donor's antigen shouldn't match with the reciepient's antibody...

If the antigen matches with the antibody then, blood transfusion reaction would occur,due to which the blood cells will stick together,causing the person to die,in some minutes.

According to RHO system blood groups are also positive and negative.
So,
According to ABO and RHO system,
Blood groups are of the following type-

1. A+,A-
2. B+,B-
3. O+
4. AB+,AB-

Ehroblastosis fetalis
Its a disease which occurs when a RH+ blood group marries a RH- blood group.
In this,the delivery of the first baby is safe.The first baby would always have a RH+ blood group,its a fact RH+ AND RH- offspring would have a RH+ blood group.
But after the first delivery the mother's body would start producing antibodies against RH,so if the next time the mother gets pregnant,then the baby would get killed in the embroyitic stage,as the antibodies will pass through placenta and react with the blood cells of the baby.

High Order thinking Questions.
Q.Is it safe for a blood group A+ to give blood to a blood group A-?
A:Yes it would be safe but only for the first time.As for the first time there wouldn't be any antibodies already against A+ blood group,but this would alert the body and the body will start producing antibodies against it.So if by the next time the person requires blood,he cant be give A- blood group blood's as it would lead to blood transfusion reaction,followed by death.

To Be Continued.......