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There are two types of blood. Deoxygenated blood, and oxygenated blood.
No, there is no limitation on people of different blood types reproducing.
There are two different types of A blood types, there is the one that originated from Europe and one that originated from the Arctic. The two blood types have specific properties and each require certain foods to be healthy.
white blood cells and red blood cells
blood and mucas
Venous and arterial
The blood groups A, B, AB and O are the seperate blood types and within a blood type the blood may be Rh+ or Rh-.
oxygen blood cells and non-oxygen blood cells
O+ and A+
red White
By the presence or absence of two antigens.
No, because A & B are dominants.