The percentage of oxygen in the atmosphere 20.95% if dropped to less than 13%, the breathing will increase the speed and depth and so increase the amount of oxygen in the pulmonary alveoli, pushing the amount of CO2 from the alveoli decreases deep breathing for a short period before returning a deep breath because of carbon dioxide combines seconds, and so changed the depth of breathing alternately increases and decreases, and called breathing then alternating periodic breathing.
The high proportion ofCO2 in the blood occurs during respiratory cessation At the same time decrease the concentration of oxygen in the blood, centers Vttenbh breathing brain and cause increasing the depth of breathing and speed, spoke of "increased ventilation "Because of this increases the oxygen concentration drops CO2 in blood And disappears alert Centers respiratory brain goes back a second case of cessation respiratory This type of breathing is called respiration Shane Stoll, a periodic breathing alternately shows the seriousness of the condition of the person, and occurs in upland areas. If increased pressure molecular oxygen in the air of the atmosphere it will happen Tkherisat in lung tissue, so may not be that person breathes pure Oxgina for more than a few hours but it is possible to breathe a gas mixture consisting of 60% oxygen and 40% for a long time without cause health damage.
The high proportion ofCO2 in the blood occurs during respiratory cessation At the same time decrease the concentration of oxygen in the blood, centers Vttenbh breathing brain and cause increasing the depth of breathing and speed, spoke of "increased ventilation "Because of this increases the oxygen concentration drops CO2 in blood And disappears alert Centers respiratory brain goes back a second case of cessation respiratory This type of breathing is called respiration Shane Stoll, a periodic breathing alternately shows the seriousness of the condition of the person, and occurs in upland areas. If increased pressure molecular oxygen in the air of the atmosphere it will happen Tkherisat in lung tissue, so may not be that person breathes pure Oxgina for more than a few hours but it is possible to breathe a gas mixture consisting of 60% oxygen and 40% for a long time without cause health damage.
Lack of oxygen HYPOXEMIA Lack of oxygen is intended shortfall at the cells of the body's tissues.Reasons for the lack of oxygen:
1- lack of oxygen due to lack of oxygen entering the body. And by the decrease of molecular oxygen pressure (PO2) in the blood and occurs in the following circumstances:
- In the high altitudes where the pressure is low molecular air including oxygen.
- Inhaling corrupt air contains a small amount of oxygen at sea level.
- Rapid breathing surface.
- Diseases of the lungs.
- Congenital heart disease in which communication between the parties to the left and right heart.
2- lack of oxygen due to anemia: produced by spin hemoglobin in the blood that carries oxygen and pressure is molecular oxygen and the percentage saturation natural and occurs in all types of anemia or poisoning carbon monoxide, which binds with hemoglobin in the same way oxygen but greedily outweigh Union oxygen b 21 times, leading to the decrease in oxygen reaches the tissues.
3- lack of oxygen toxic: by poisoning oxidizing yeasts in tissue toxic substance such as cyanide where tissue itself becomes disabled and not able to take advantage of the oxygen that is compact molecular naturally and then rises in the veins to become higher than in arteries.
4- lack of oxygen stasis: It is caused by slow blood circulation through the tissues Pressure molecular oxygen in arterial blood naturally portable Kamihaloxgen normal, but the molecular pressure and quantity of oxygen in the venous blood is very low, and in the case of congestive heart failure.
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