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Air Space

The space in the atmosphere immediately above the earth.Air spaces are present in some cells for a variety of reasons. Sometimes air spaces are present in hydrophytes (aquatic plants) that assist in buoyancy.

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Human Limits and how to Surpass Them

... As for my research I have found very little, I found mention of dead space in the human lungs which limits the amount of air that can actually be used in the respiration process, but there was also mention of some ...

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by JaxFirehart
Fri Feb 28, 2014 11:33 pm
Forum: Human Biology
Topic: Human Limits and how to Surpass Them
Replies: 2
Views: 1354

Diffusion and concentration gradient

... CO2 and NOT O2? Conversely, how do the CO2 molecules realise that the air in the alveoli is O2-rich but low in CO2... At first I thought that diffusion depended on 'space', whereby any molecule tries to get as much space around itself as possible and hence ...

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by Aymeric
Sun Dec 15, 2013 1:02 am
Forum: General Discussion
Topic: Diffusion and concentration gradient
Replies: 7
Views: 5011

Re: 5 best proofs of evolution

... materials (in some primordial soup) or in some invasion from outer space. That may well be true. But what is clear is that any such origin for ... we put these three points together, the rational case for evolution is air tight. If all living creatures must have a living parent, if living creatures ...

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by Raven7899
Sun May 27, 2012 11:46 am
Forum: Evolution
Topic: 5 best proofs of evolution
Replies: 170
Views: 242505


... atmosphere, but a near collapse is enough to show you. this changed the air pressure that was on the earth. The change in air pressure caused a change ... size. This was shown in something called the Eden project. A desolate space of hillside was taken and covered in a dome to create an individualized ...

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by Tomn
Mon Oct 24, 2011 8:46 pm
Forum: Evolution
Replies: 63
Views: 27523

Re: Closed Ecosystem

... two tons of 'stuff' per month for us to exist at the international space station; if we are ever to even travel to mars we have to get over ... we still need at least 14 months worth of 'stuff' (stuff being our air, water and food we need to survive, mostly) So that is: 14 x 2tons= 28 ...

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by twilliam384
Fri Sep 10, 2010 10:30 pm
Forum: Ecology
Topic: Closed Ecosystem
Replies: 3
Views: 9121
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