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What happens to your blood in space?

Updated: 8/10/2023
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15y ago

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In the vacuum of space, exposed liquids will evaporate very quickly, so quickly they will bubble and boil.

This rapid evaporation will cause the blood to cool down, and it will freeze solid in minutes or even seconds.

Even after it has frozen solid, the remaining blood will continue to evaporate, but much more slowly.

If it's still in your body, however, this won't happen, because your skin acts as a sort of 'space suit' partially protecting the blood from the vacuum. Your blood will begin to evaporate and make bubbles in your blood vessels, but much more slowly than if it were exposed to vacuum directly.

But your mouth will be in vacuum, and so you will notice your saliva boiling and freezing on your tongue. You will pass out from lack of oxygen long before your blood begins to boil.

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15y ago
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12y ago

Liquids evaporate more easily if the pressure goes down. For example, water boils easier in Denver than in L.A. since Denver is higher and the air pressure is less. The pressure in space is very, very low and so any liquid would evaporate into a gas.

However, there is a lot of ice in space; in comets, asteroids, maybe the moon, etc. This ice may have come from previous bodies, such as an ancient planet, that broke up. The ice may have come from liquid water on this planet that froze faster than it could evaporate. I'm just making this up but it sounds plausible to me.

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14y ago

Air pressure exists on the planet Earth because of the gravitational attraction of the Earth, which pulls the air downward. In space, gases can just expand to the point of zero pressure.

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Q: What happens to your blood in space?
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What happens when you go outside in outer space?

When you go outside in outer space, you are unable to breathe. You would most likely pass out and your blood would then boil and finally freeze because of the vacuum of space.


What happens if you're naked in space?

If you are naked in space your blood will boil, you can't breath so you suffocate, you burn, you freeze and you are inflated like a balloon, in simple terms, you die.


Why does blood boil in space?

It doesn't...that's a myth. Blood doesn't boil in space.


What happens to Blood pressure of astronaut in space?

Because blood is liquid, its boiling point is affected by pressure changes. Extremely low pressure would lower the boiling point enough that the blood would boil at a temperature less than body temperature.


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What happens to water in space?

Because there is no gravity in space, and because liquids' natural shape is a sphere; water, or any other liquid for that matter, in the zero-gravity of space will automaticly transform into a floating ball of liquid if not contained. For example, because your blood is contained in your veins and there is no air in your blood vessels, your blood will not do this.lol, no.the oxygen in the water would expand rapidly, aka boil. then it would intermediately freeze and turn into a cloud of ice.


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