reply to post by Arbitrageur
Here is a little about high and low level pressure and oxygenation on the body. While these traits, like that of having a smaller lung for low
altitude/ higher pressures or being short and stout are adaptations to environment I say they are indicative of how our body responds FROM its
original setting. High pressure systems usually associate with clear skies and nice weather.
The need to favor short and stout like the body does with preserving heat would not be indicative of the result of air pressure or even oxygenation
but rather cold weather for low pressure systems that are known for lousy, cloudy weather. Darker skin pigment from higher exposure to the suns
radiation from clear skies are not indicative of high pressure either since they are simply dealing with the lack of clouds in a high pressure system.
Being tall and lanky is better for hot weather, not for getting more air.
That is why I do not see the particular traits of a species to be indicative of the maxim of environment, instead I see it as dealing with the
particulars. What I see with a fundamental change in oxygen content and pressure I associate with it is that the earth may have produced larger
species as a result of high pressure systems all over the globe.
Those high pressure systems going hand in hand with really warm weather as they are known to produce. If the whole planet was allot warmer like we
have come to accept, then it is only logical that the worlds habitats were mostly high pressure systems. This with our knowledge of the earth having a
richer oxygen content would explain why all life from plants to fish were bigger. This combination might be the natural state our original species
worked from to produce our current populations.
It is not worthy that people at different altitudes in different places like Tibet or the Andes all have made different adaptations to keep their
blood oxygenated. This shows that they were working from a common starting point since the standard their new physiology favors falls under the same
standards of cellular oxygenation.
Also note worthy is that in just 3000 years the Tibetan people have made their adaptations showing possibly the fastest case of evolution ever known.
Now take that model and stretch it over millions of years and you have a possible root cause for evolutionary adaptation. A direct trigger over food
supply or predatory threats.
If the earth does warm again and develop high pressure systems again, I ASSUME oxygen content will increase as plant size increases, causing a cycle
of increasing growth in mass for all species. Adaptations will favor warmer weather and so we will see fast changes in evolution....some we might have
Hyperbaric Oxygen Therapy (HBOT) has been used for over a century to treat almost all types of injuries, such as stroke, Cerebral Palsy, gangrene,
and non-healing wounds. Now, even more recent clinical and university studies have shown HBOT supports the body’s production and mobilization of
mesenchymal stem cells. Oxygen works on our stem cells on several different levels. HBOT mobilizes MSC’s from our bone marrow by a nitric oxide (NO)
dependent mechanism we call NO synthesis. Nitric oxide is a chemical our body produces that is used as a signaling molecule.
Once the MSC’s get to where they are directed to go, they differentiate into more specialized cells and begin to heal damaged cells. HBOT supports
this process and also delivers oxygen needed to facilitate and sustain cell repair.
Hyperbaric oxygen therapy (HBOT) is medicine's most efficient method of transporting oxygen to cells throughout the body. When you breathe oxygen
at normal atmospheric pressure, it is transported on the hemoglobin in your red blood cells. Under pressure, however, oxygen dissolves in the plasma,
cerebrospinal fluid in the brain and spinal cord, lymph, and other body fluids. It is therefore easily delivered to all tissues, and even areas with
limited blood flow are afforded the tremendous healing benefits of oxygen.
HBOT also curbs infection, by providing a hostile environment to anaerobic bacteria, which thrive in the absence of oxygen. It promotes the growth of
new capillaries and blood vessels to areas with poor circulation for cardiovascular support and boosts collagen formation for faster wound healing. It
also mobilizes rejuvenating stem cells
Air pressure is not uniform across the Earth however. The normal range of the Earth's air pressure is from 980 millibars (mb) to 1050 mb. These
differences are the result of low and high air pressure systems which are caused by unequal heating across the Earth's surface and the pressure
When we breathe in air at sea level, the atmospheric pressure of about 14.7 pounds per square inch (1.04 kg. per cm.2) causes oxygen to easily
pass through selectively permeable lung membranes into the blood. At high altitudes, the lower air pressure makes it more difficult for oxygen to
enter our vascular systems. The result is hypoxia , or oxygen deprivation.
In contrast, the native high-altitude resident has a blunted hypoxic ventilatory response (ie, is desensitized) to hypoxia. Improved oxygen usage
in the peripheral tissues with decreased ventilatory effort has been postulated as an explanation for this phenomenon. Studies of high-altitude
residents showed that for desensitization to occur, exposure to high altitude must occur in early childhood and last several years. The decrease in
hypoxic ventilatory response is first noted after 8 years of age. At the same time, vital capacity increases correspondingly.
After desensitization to hypoxia has occurred in the high-altitude resident, it persists for years, even if the person returns to sea level. Offspring
of lowlanders born and raised at high altitude have the same phenomenon as that of native highlanders. The native highlander hyperventilates compared
with the lowlander, and the high-altitude resident hypoventilates compared with the newcomer to altitude.
I would argue that the earth once had a general uniformity in weather, and in pressure as well as oxygen content. I say that when that started to
change as the weather got colder, that we saw the explosion in species evolutionary change branching off as well as the reduction in size.
I say that our current model of varying weather across the globe in its many extremes has caused our different traits in species being permanent once
global weather stabilized. I also say that once it begins changing that we will see the greatest jumps in evolutionary change due directly with
processes on the cellular level and their efficiency in different environments.
edit on 12-9-2012 by BIHOTZ because: (no reason given)