# What is the blood ejection speed outward from human body vein? [closed]

At what height blood can eject from human vein ? I see, sometime there is direct blood transfer from one person to patient. So sometime blood bottle is kept at certain height and blood is transfered from person to upper bottle and then from that bottle to patient directly. At what height blood can go ?

EDIT

For example, I had not mentioned before, What would be the blood pressure outside from body after cutting certain nerve or vein or whatever which carries blood-speedily, when we go inside vacuum chamber ?
Consider any chamber where you will be able to remove air/atmosphere inside it and a person is provided with oxygen cylinder. Now what will be the blood ejection speed outward from the body ? At what height ? You will have to consider atmospheric pressure also when we leave normally on earth. So question is, at what height in vacuum (where there is no pressure from outside world) ?

## closed as off-topic by Atl LED, biogirl, Chris♦, Amory, AndroidPenguinApr 6 '14 at 0:31

• This question does not appear to be about biology within the scope defined in the help center.
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• I'm a little uncertain based on your title and wording, but are you asking how elevated a human donor has to be, vs. the recipient, for an unaided (no pump) blood transfusion? – Atl LED Mar 20 '14 at 14:26
• @AtlLED At what height blood can go if one's vein got cut by knife or something ? – AmitG Mar 20 '14 at 14:32
• This question appears to be off-topic because even though it presents a biological scenario it is about basic principles of physics. – WYSIWYG Mar 21 '14 at 5:02
• You can use Bernoulli's equation and the equation of continuity to measure velocity of blood from the cut site. Then add the effect of gravity of calculate the distance covered. – WYSIWYG Mar 21 '14 at 6:40
• This question appears to be off-topic because it is about physics. – Atl LED Apr 1 '14 at 21:51