eli5: how come when someone gets cut in the neck, blood comes out like it’s from a hose and people faint quickly? Does blood travel fast in that area?
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The neck provides blood flow to the head connection to the head. Inside of it are the carotid artery and jugular veins. These circulate blood to the very very blood intensive brain.
They’re relatively big so even even bleeding from a vein like the jugular is bad.
There’s generally 3 different “looks” with most bleeding. Capillary which is the tiny little nearly single cell width blood vessels. That’s like a paper cut. Slowly kind of just show up. Dab a little blood and it’s gone.
Veinous which is on well, a vein. These return the blood and are generally lower pressure. It’s where blood draws are from. They bleed pretty well but most of the time not spectacularly.
Arterial bleeding is where things get all horror movie like. This is the higher pressure delivery system of blood. It can literally spray blood out.
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