I'm Nitin Kumar. Welcome to our KZfaq channel Farzi GYAN.
About This Video : -
In the human body, blood plays a major role in the transportation of hormones, nutrients, respiratory gases. Blood groups, also called blood types, can be defined as the grouping of blood and are based on the presence or absence of antibodies and genetically derived antigenic substances on the surface of red blood cells (RBCs).
You can usually donate blood if you:
1. are fit and healthy
2. weigh between 50kg (7st 12lb) and 158kg (25st)
3. are 17 to 65 years old
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