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
Because there not blood everywhere in a significant volume and the vein is the return flow to the heart so it’s not stealing blood full of oxygen and nutrients. It’s also a thin pipe with very low pressure compared to arteries and they heal very easily, while providing all the volume needed for that 5-10 mL pull in the shortest amount of time. All in all it’s the best place.
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