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How does gaseous exchange in a scuba tank occur?

Updated: 8/18/2019
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14y ago

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????? gaseous exchange INSIDE the Scuba cylinder?

There is no exchange of gasses in the cylinder, that is done in the LUNGS!

A scuba Cylinder (or Tank for the americans) is a basic unit that holds compressed Gas (either AIR -21% oxygen and 79% nitrogen) NITROX (anything from 22% to 40% oxygen) Heliox (18% oxygen 40% helium rest nitrogen)

All that occurs is that the unit supplies the gas inside to a REGULATOR system fitted to the valve then to the Demand valve in the divers mouth.

No gas EXCHANGE is done here at all, only pressure restrictions.

Gas exchange happens once the Gas has entered the Lungs, there the Alveoli take the gas (mostly the oxygen) and pass it to the blood stream, and pass the Carbon Dioxide back into the lungs to breathe out.

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Q: How does gaseous exchange in a scuba tank occur?
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