eli5 In movies and video games and stuff, characters get stabbed in the gut all the time and this usually causes them to puke up blood instantly. People have told me this is realistic and have tried to explain how it happens but I never get it. How does a stab cause blood to come out of their mouth?
In: Biology
To be exact in order to puke up blood the wound would have to open a hole in the stomach/lungs or at the very least the airway/esophagus. One a hole in made in one of those areas your body will try to expel the blood just as it would something like water or the like.
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