What about sea plants, do they work the same way as land plants? That would provide oxygen. I don't know how photosentisis would work that far down though, but they would probably use a different process.
Whales go up to the surface and blow out CO2 (and water) through holes as they are still mammals.
That is, they are like us.
What's it like being homeschooled?
Fish farts.How does the oxygen get into the water? Creature breathes oxygen. Oxygen gets used up.
When you're 5000 feet below sea level, where does the oxygen come from?
You're not only ignorant but stupid too.
Nobody knows everything about everything.
What's it like being homeschooled?
Apparently sleeping with the teacher isn't frowned upon.
:awe:At that depth the deep sea creature uses a specialized cell mitochondria with quantum entangled molecules containing quasi-existent oxygen atoms. As they use up the oxygen, it is immediately replaced by a new oxygen atom that pops into existence just as oxygen elsewhere on the planet pops out of existence. This can only happen at colder temperatures due to the erratic nature of inter-quantum bifold dimensional states and the real reason climate change will have such a huge impact on our ecosystem. Just a 3 degree (F) increase in deep sea temperatures will make it impossible for them to breath and there will be a deep sea mass extinction event that will take about 15 years to spread to land animals. Although land animals don't depend on quantum entangled molecules for oxygen exchange, they do depend on the carbon sublimation cycle deep sea creatures also perform. Without carbon sublimation all of our agriculture will cease as all natural and artificial fertilizers will become completely inert and our society will literally starve to death.
I'm sticking with fish farts. I may be willing to make concessions and move onto quantum-entangled fish farts.At that depth the deep sea creature uses a specialized cell mitochondria with quantum entangled molecules containing quasi-existent oxygen atoms. As they use up the oxygen, it is immediately replaced by a new oxygen atom that pops into existence just as oxygen elsewhere on the planet pops out of existence. This can only happen at colder temperatures due to the erratic nature of inter-quantum bifold dimensional states and the real reason climate change will have such a huge impact on our ecosystem. Just a 3 degree (F) increase in deep sea temperatures will make it impossible for them to breath and there will be a deep sea mass extinction event that will take about 15 years to spread to land animals. Although land animals don't depend on quantum entangled molecules for oxygen exchange, they do depend on the carbon sublimation cycle deep sea creatures also perform. Without carbon sublimation all of our agriculture will cease as all natural and artificial fertilizers will become completely inert and our society will literally starve to death.
Since we're asking life questions... Why do we assume liquid is the basis of all life (is that just on Earth, and Mars)? And why can't there be [even if invisible-to-us] alien beings that have other methods that sustain life, who don't need to breathe, etc.?
There's bacteria and other organisms that live off methane, sulfur, etc.
The air is dry to reduce oxidation. Newer composite aircraft, such as the Dreamliner, have more normal humidity levels because the fuselage is one piece of composite that won't oxidize.
did you just call me a blow hole?
screw you man... YOU'RE the blow hole
The air is dry because it's largely recirculated dude.
Edit- http://www.askthepilot.com/questionanswers/cabin-air-quality/
If passengers have one very legitimate gripe, its about dryness. Indeed, the typical cabin is exceptionally dry and dehydrating. At around 12 percent humidity, it is drier than you will find in most deserts. This is chiefly a by-product of cruising at high-altitudes, where moisture content is somewhere between low and nonexistent. Humidifying a cabin would seem a simple and sensible solution, but its avoided for different reasons: First, to amply humidify a jetliner would take large quantities of water, which is heavy and therefore expensive to carry. Humidifying systems would need to recapture and recirculate as much water as possible, making them expensive and complicated. They do exist: one sells for more than $100,000 per unit and increases humidity only by a small margin. Theres also the important issue of corrosion. Dampness and condensation leeching into the guts of an airframe can be damaging.
The 787's cabin air system will be fundamentally different.
Cabin air will be vented directly from the outside through dedicated inlets on each side of the plane's belly and won't pass through the engines, says Mike Sinnett, the 787 project director.
The 787 system will be driven by electricity generated by the engines. An electrical system makes it easier to humidify the cabin air because it's not starting with the hot, dry air from the jet engines, says physicist Hans Weber of consulting firm Tecop International in San Diego.
With the 787 fuselage made of composite material, it's possible to increase the humidity without corroding the airplane over time. On the 787, the manmade composite material is formed and baked into large barrels that are linked together to form the fuselage. The composite material doesn't corrode as aluminum does. As a result, the 787 cabin air system will allow 15% humidity, a more comfortable level than the current 4%.