![]() ![]() If the person were able to hold their breath, they could probably last for at least a few minutes before they ran out of air (and this would protect them from their lungs freezing, too). But here’s the best guess.) In space, the three big problems are (1) no air, (2) there’s no air pressure in space, and (3) it’s extremely cold (much colder than at the bottom of the ocean). (Fortunately, this hasn’t actually happened yet, so we don’t really know exactly what would happen. now, if the person were unprotected in space. The nitrogen would bind to the parts of the body that need to use oxygen, and the person would literally suffocate from the inside out. And especially since air is mostly nitrogen, the blood would become full of dissolved nitrogen. If the person did have some way of getting air into their system, their body would immediately undergo what’s called "nitrogen narcosis." This happens because at high pressures, nitrogen is much more soluble in water (or blood) than oxygen is. (4) At high pressures, the chemistry of how the body works changes. This is one of the big reasons that divers don’t use suits like this anymore.) (Part of the problem with the old pressure suits that deep-sea divers used to use was that if they depressurized, the soft part of the suit and the entire body would be crushed into the rigid helmet. But if there’s no air-filled space to be pushed into, the body would not be crushed. ![]() At the same time, the pressure from the water would push water into the mouth, filling the lungs back up again with water instead of air. (The air would be compressed.) So, the lungs would collapse. The pressure from the water would push in on the person’s body, causing any space that’s filled with air to collapse. (Although you’d lose consciousness after about 5.) If you can’t breath, your body won’t stay alive for more than about 30 minutes. You can’t breath at the bottom of the ocean. Because it’s so cold, the person would experience severe hypothermia, and the body would eventually stop working because of the cold temperature, but this is probably not what would kill them. (Let me warn you ahead of time that if you have a weak stomach, you may not be interested in some of the images that this all draws to mind.) First, if a person were to wind up unprotected at the bottom of the ocean.Īt the bottom of the ocean, there’s four big things that would happen. But, since you seem to be looking for a more specific answer than that, let’s take it one at a time. Well, the rough summary in either case is that the person in question would be very dead, very fast, in a very unpleasant manner. ![]()
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