Does the exit of blood from the human body invalidate the ablution or not?

So it was a very natural thing that the Shari'ah would conform to the sound fitrah (the innate natural disposition). The fitrah does not consider tears impure, nor does it consider the blood that comes out of the human body impure. Many people say that blood is impure and that if it comes out of a person, his wudu' (the ablution for prayer) is invalidated. This is also incorrect according to the evidence of the Shari'ah. And so, Islam, as the Lord of the Worlds said: But this does not mean that a person makes the Shari'ah according to his own liking, taking what is easy for him from it, whether the Shari'ah came with it or not. No. The matter is not like that; the matter is following the explicit Shari'ah, and Allah is sufficient for the believers in fighting.