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... row on the face.
The blood circulation on the face is very rich, with blood vessels crisscrossing through the facial muscles.
Superficial veins are connected to deep veins and directly enter the venous sinuses inside the skull.
The most terrifying aspect is that there are no venous valves in the facial veins to prevent the backflow of blood.
When the muscles contract, blood can flow backward into the skull, the heart, and then to the organs throughout the body. ...
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