Fator Rh - por que o sangue é positivo ou negativo?

Hello, little scientists, I am Professor Bill Tyson and together we are going to know different forms of science. In the previous episode we talked about the ABO system, and we defined the types of blood. But you must have realized that beyond the blood types there is another factor.

The blood is negative or positive. Calm down does not mean blood is good or bad. This characteristic of blood is what we call the HR factor.

The HR System was discovered in 1940 in the research of Austrian physicians Karl Landsteiner and Alex Wiener. They used in their experiments Rhesus monkeys, hence the name Rh Factor. The experiments consisted of injecting monkeys' blood into rabbits.

They saw that the rabbits produced antibodies, which bound the red blood cells, thus making the red blood cells agglutinate as if they were a foreign agent or antigen. the red blood cells agglutinate as if they were a foreign agent or antigen. They then did the research on humans, and the people who produced the anti-Rh were called Rh positive, but the ones that did not produce were called Rh negative.

So this is another important factor in blood transfusions. A person with Rh positive factor can not donate to a Rh negative person, because it can generate a reaction of the antibodies, and agglutinate the red blood cells. However, a person with Rh negative can donate to a Rh positive person because the donor does not have the antibodies.

Then the blood with Rh negative can donate independent of the Rh Factor, and the Rh positive blood can receive independent of the Rh Factor. For now, it's just personal, see you next time. Hey guys.

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