There are two types of blood. Deoxygenated blood, and oxygenated blood.
The two most common blood types in the US are O positive and A positive.
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
The two types of blood that are in the heart are oxygen-rich blood that is pumped from the lungs to the body (systemic circulation) and oxygen-poor blood that is pumped from the body to the lungs (pulmonary circulation).
oxygen blood cells and non-oxygen blood cells
red White
No, because A & B are dominants.
By the presence or absence of two antigens.
I believe type O blood is the one blood type that can be matched to any of the other blood types. There is one type of blood, though, that is not compatible with type O blood. However, that is very rare.