You’re always told to apply pressure, but how does that actually staunch the flow of blood to the area?
In: Biology
Blood vessels of all sizes, from large arteries down to microscopic capillaries, are floppy tubes. The only thing holding them open is the pressure of the blood inside, which can easily be overcome with a few pounds of force. When you apply pressure around an injury, it temporarily collapses the blood vessels and stops the blood from leaking out. Once the flow of blood stops or slows down, it can start to clot more easily.
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