RE: Oxygen..
November 9, 2014 at 6:20 am
(This post was last modified: November 9, 2014 at 6:23 am by Aractus.)
(November 8, 2014 at 5:18 pm)lifesagift Wrote: I asked a similar question about blood and the circulatory system the other day and got a very fulfilling answer, so trying again.Diffusion is very very quick, it has to be because blood is continually flowing through the capillaries. O2 is picked up by haemoglobin in the RBCs and transported to cells around the body. Oh and the capillaries around the alveoli are so thin that RBCs only just fit through and thus brush against the membrane maximising diffusion to (CO2) and from (O2) the alveoli.
So I imagine at an atomic level, or possibly cellular level, things like osmosis or the movement of cells and atoms from one place to another is quite slow? I imagine H2O molecules taking minutes to 'seep' through some membrane?
But my question is to do with the movement of oxygen from the air we breathe to the blood that transports it around our bodies...
If you think about it, you breathe in, and then usually breathe all that air out again straight away ! And only a portion of that air will be against a wall of any sort... how does the transition of oxygen happen quickly and efficiently enough in order to feed how whole bodies?
For Religion & Health see:[/b][/size] Williams & Sternthal. (2007). Spirituality, religion and health: Evidence and research directions. Med. J. Aust., 186(10), S47-S50. -LINK
The WIN/Gallup End of Year Survey 2013 found the US was perceived to be the greatest threat to world peace by a huge margin, with 24% of respondents fearful of the US followed by: 8% for Pakistan, and 6% for China. This was followed by 5% each for: Afghanistan, Iran, Israel, North Korea. -LINK
"That's disgusting. There were clean athletes out there that have had their whole careers ruined by people like Lance Armstrong who just bended thoughts to fit their circumstances. He didn't look up cheating because he wanted to stop, he wanted to justify what he was doing and to keep that continuing on." - Nicole Cooke
The WIN/Gallup End of Year Survey 2013 found the US was perceived to be the greatest threat to world peace by a huge margin, with 24% of respondents fearful of the US followed by: 8% for Pakistan, and 6% for China. This was followed by 5% each for: Afghanistan, Iran, Israel, North Korea. -LINK
"That's disgusting. There were clean athletes out there that have had their whole careers ruined by people like Lance Armstrong who just bended thoughts to fit their circumstances. He didn't look up cheating because he wanted to stop, he wanted to justify what he was doing and to keep that continuing on." - Nicole Cooke
