This action will also push against internal organs. For instance, air expansion in the gut will push against the diaphragm and heart.
As air is rapidly expelled out of the lungs, there might be some damage to the delicate tissue the lines the lungs and the airways. In fact, it is the loss of oxygen that will kill you first. If you do this, bubbles of air will be forced into the bloodstream, eventually arriving in the brain where they will cause a stroke. Holding your breath will also expose the lungs to the force of atmospheric-pressure air against pure vacuum, likely rupturing quickly. This can happen to scuba divers if they descend too quickly into deep waters.
That happens around the two-minute mark when all the other organs fail from oxygen deprivation. There are quite a few instances of vacuum-induced hypoxia that we know of. In , a technician who was running tests on a vacuum chamber was accidentally exposed to extremely low pressure, equivalent to 3. He spent a full minute in these conditions until he was pulled out. First off, you're not going to explode , and your blood's not going to boil.
Just because there's zero pressure outside doesn't mean that your body suddenly loses all cohesion. You may have noticed a particularly useful organ that covers you from head to toe — you know, skin. It does a really great job of keeping your insides inside. It's a little bit elastic, but not much, and it's perfectly capable of preventing your guts from spilling out all over space.
It also keeps your blood pressure high enough to stop your blood from boiling. But just because you won't explode doesn't mean you won't inflate. The nitrogen dissolved in your bloodstream near the surface of your skin will collect itself into little bubbles.
These bubbles expand, puffing you out to around twice your size, starting at your hands and feet and moving in. It's a real thing: it's called ebullism. Sure, you'll look like the worst balloon animal ever, and you'll feel pretty miserable, but you won't be dead…at least not right away. Left unchecked, the inflated bubbles will cause significant tissue damage, but other things will kill you first.
The temperature — or rather, the lack of temperature — won't get you right away, either. The reason you can get hypothermia so quickly from lukewarm water isn't the temperature of the water itself, it's that water is really, really good at conducting and convecting heat away from you. Any heat your body's metabolism produces gets sucked away.
By Karl S. According to the advertising blurb for the movie, Alien : "In space no one can hear you scream. But inside the International Space Station ISS , the American astronauts and Russian cosmonauts do breathe air almost identical to the stuff we breathe down here on planet Earth - same pressure and about 80 per cent nitrogen and 20 per cent oxygen. It turns out they get it by 'splitting' H 2 O with electricity. But, like everything to do with space travel, it's tricky.
The ISS has been continually inhabited by humans since November 2, They're mostly astronauts from the USA and cosmonauts from Russia, but there have been many other spacefarers from some 13 different countries.
When they go to sleep, the inhabitants of the ISS have to make sure that they are in a well-ventilated area. If there is not good airflow, the carbon dioxide they breathe out will accumulate around their heads. On Earth, the expired air from our lungs is usually warmer than the ambient air. When you combine this difference in temperature with Archimedes' Principle, the warm air rises and the cooler air falls. Before they discovered this, the spacefarers would sometimes wake up gasping for oxygen.
On the other hand, it's better to wake up gasping, than to not wake up at all. The truth is both less dramatic and far more fascinating -- as we have discovered through accidents in space and in test chambers, and animal experimentation in the s. The first thing you would notice is the lack of air. You wouldn't lose consciousness straight away; it might take up to 15 seconds as your body uses up the remaining oxygen reserves from your bloodstream, and -- if you don't hold your breath -- you could perhaps survive for as long as two minutes without permanent injury.
If you do hold your breath, the loss of external pressure would cause the gas inside your lungs to expand, which will rupture the lungs and release air into the circulatory system. The first thing to do if you ever find yourself suddenly expelled into the vacuum of space is exhale. The other things, you can't really do much about. After about 10 seconds or so, your skin and the tissue underneath will begin to swell as the water in your body starts to vaporise in the absence of atmospheric pressure.
You won't balloon to the point of exploding, though, since human skin is strong enough to keep from bursting; and, if you're brought back to atmospheric pressure, your skin and tissue will return to normal.
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