10 Amazing Things You Didn’t Know About Blood
Doctors Experimented With Animal To Human Transfusions
Before blood was fully understood by scientists and medical professionals, some doctors experimented with giving their patients transfusions directly from animals. These didn’t go as planned and most people suffered from instant reactions that included vomiting and kidney failure.
Brain Freeze Is Caused By Blood
The most commonly accepted explanation for brain freeze has to do with the arteries leading to the brain. The cold temperatures reacts with the blood, causing the arteries to dilate very quickly, which causes the intense pain in the mouth and head.