It’s often seen in film/books/etc. that when someone receives a chest injury, is smashed against a wall or similar, he coughs up blood or has blood coming out from his mouth. Does this actually happen? Why?
If the lungs get damaged it makes sense that blood gets coughed up, but what about injuries that affect other organs?
In: Biology
If there is an injury anywhere from the mouth to the lungs, sure, you could cough up blood. For the most part, it is just a visual they are trying to make to show that the person in question is seriously injured.
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