Write in brief about the following:
The four types of blood in humans are called blood groups.
These are A, B, AB and O. The blood is determined by the antigens present on the RBCs. RBCs also contain antibodies in the plasma.
Concept: Blood Vessels of the Heart: Vena Cavae, Pulmonary Veins, Pulmonary Trunk, Aorta, Coronary Artery and Vains
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