Why can’t they just stuck the syringe anywhere to get blood? Is there something different getting the blood directly from the vein?
In: Biology
Blood is only in the vasculature (veins and arteries). We do sometimes take blood from arteries. Veins are good enough for most purposes though, and the pressure inside veins is lower wich means it will bleed less when the needle is taken out.
Source: I’m a paramedic.
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