Hypoxia
Hypoxia is a condition in humans that is caused by the reduction in partial pressure of oxygen, inadequate oxygen transport, or when tissues are simply unable to make use of the oxygen provided. This disease occurs in the tissues and brain. It results in a shortness of breath, and an overall impairment of function. Anoxia is the extreme form of hypoxia, and it occurs when there is absolutely no oxygen at all in the body that the brain and tissues can make proper use of. There are five different types of hypoxia. These types are hypoxemic hypoxia, anemic hypoxia, stagnant hypoxia, histoxic hypoxia, and pemic hypoxia. Hypoxemic hypoxia happens when there is a reduction in the amount of oxygen passing into the blood, resulting in too much hemoglobin and not enough oxygen. Therefore the oxygen pressure in the blood that is traveling to the tissues is too low to saturate the large amounts of hemoglobin. Hypoxemic hypoxia is caused by a reduced gas exchange area, exposure to high altitude, or by lung disease. Hypoxemic hypoxia has also been proven to be hazardous to aviators, mountain climbers, and generally in people living at high altitudes because the lowered barometric pressure causes the supply of oxyge
That is why hypoxia should be considered a probable enemy to today's society. In both of the latter cases the hemoglobin is so altered by toxic agents that it becomes unavailable for any oxygen transport, and therefore is no longer useful to the respiratory system. Hypoxia is not something to be joked about, it has the potential to seriously harm someone or even be fatal. Also, the lower barometric pressures of high altitudes lead to lower partial pressure of oxygen in the alveoli in the lungs, which in turn decreases how much oxygen the red blood cells absorb from the alveoli for transport to the body's tissues. Although altitude sickness is associated with hypoxia, especially with hypoxemic hypoxia, they are not the same thing. In a local case of stagnant hypoxia, it may be due to any condition that reduces or prevents blood circulation anywhere in the body. Altitude sickness symptoms occur six hours to four days after the arrival at high altitude, and after two to five days they disappear.
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