Quote:
Originally Posted by jambutty
When you withdraw blood from a vein does the hypodermic withdraw (suck) the blood out or is the heart pumping it out? You can still withdraw blood from a dead body therefore the blood is sucked out.
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No blood is not sucked out of a dead body. You create a low pressure in the syringe, the body is at atmospheric pressure, so the blood moves to the low pressure in the syringe.