This product developed into a human product when lactate was added. Landsteiner decided that human beings could possibly be separated into blood groups in accordance with the capability of their pink cells to clot in the presence of different serums. The white blood cells are chargeable for the immune defense. Physicians believed that the milk helped regenerate white blood cells. He believed there have been intrinsic biochemical similarities and dissimilarities in blood. These outcomes had been slightly deceptive, nonetheless, because it was later decided that frogs could survive for amino acids supplier Europe a short time without any blood circulation at all.