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| quote: | Originally posted by Ozoned12
Serious? |
http://www.faqs.org/faqs/sports/skydiving/faq/
| quote: |
"How do you breath in freefall?"
-- Through genetically developed gills.
This falls into the realm of urban folklore. One CAN breathe in freefall - if
it were necessary. However, due to the high speed of terminal freefall (and
much higher speeds in vertical freefall dives), the jumper's body is exposed to
O2 molecules at a much higher rate than someone walking around on the ground.
The body is able to absorb the necessary O2 through the skin. This is why
jumpers flap their cheeks in freefall, it presents a larger surface area to the
airstream for oxygen osmosis. Once under canopy, the jumper resumes breathing
normally.
This is also why jumpers do not jump on cloudy days or when they might risk
going through clouds. The moisture in the clouds can condense on their exposed
skin surfaces preventing the absorption of the necessary oxygen resulting in
suffocation. AADs are recommended for jumpers in climates where weather is a
factor. |
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