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من طرف KASIR السبت أكتوبر 18, 2008 7:11 pmRespiratory System
The respiratory system comprises of the nose, mouth, throat, larynx, trachea, bronchi and lungs. The function of the respiratory system is to facilitate gaseous exchange to take place in the lungs and tissue cells of the body.
The normal rate of inspiration and expiration, the respiration rate, is about 16 times a minute in an adult.
Composition of Air
Effect of exercise on the respiratory system
In the Cardiovascular system, the benefits of exercise were discussed in relation to the improved functioning of the heart and the lowering of blood pressure. Combined with increased maximum oxygen consumption (VO2 max), or lung capacity, these are all vital contributors to being fit and healthy.
An athlete who has not properly trained their cardiovascular system is likely to incur other injuries more easily by the rapid onset of fatigue and the consequent lowering of motivation and mental awareness. For anyone competing at varying altitudes, they must allow themselves a considerable period to acclimatise before an event. Even climbing to a moderate altitude decreases the maximum uptake by 7% to 8% due to the change in atmospheric pressure. This decrease in oxygen being supplied to the muscles may decrease performance by 4 to 8% depending on the duration of competition, a considerable disadvantage at the finish line.
Even the athlete who prepares and acclimatises well may still not match natives of high altitude areas such as the Andes, who have a larger chest capacity, more alveoli, larger capillary beds and higher red blood cell count. Since people may suffer from altitude sickness when moving from low to high altitudes, sufficient time must also be allowed for these symptoms to disappear before starting intensive training.
WITH MY LOVE
KASIR
The respiratory system comprises of the nose, mouth, throat, larynx, trachea, bronchi and lungs. The function of the respiratory system is to facilitate gaseous exchange to take place in the lungs and tissue cells of the body.
| Oxygen is required by cells in the body to allow various metabolic reactions to take place and to produce energy and is therefore essential to life. The respiratory system may be defined as the organs and tissues through which air is passed into and out of the body to allow the necessary gaseous exchanges to take place. External respiration is the means by which oxygen from the air passes into the blood stream for transportation to the tissue cells and carbon dioxide is collected and transferred back to the lungs and expelled from the body. Internal respiration involves the vital chemical activities that take place in every living cell requiring oxygen and glycogen to combine and release energy, water and carbon dioxide. | Organs of the respiratory system |
The normal rate of inspiration and expiration, the respiration rate, is about 16 times a minute in an adult.
Composition of Air
Breathed In | Gas | Breathed Out | |
21% | Oxygen | 17% | |
78% | Nitrogen | 78% | |
0% | Carbon Dioxide | 4% | |
1% | Tracer Gases | 1% |
Effect of exercise on the respiratory system
In the Cardiovascular system, the benefits of exercise were discussed in relation to the improved functioning of the heart and the lowering of blood pressure. Combined with increased maximum oxygen consumption (VO2 max), or lung capacity, these are all vital contributors to being fit and healthy.
An athlete who has not properly trained their cardiovascular system is likely to incur other injuries more easily by the rapid onset of fatigue and the consequent lowering of motivation and mental awareness. For anyone competing at varying altitudes, they must allow themselves a considerable period to acclimatise before an event. Even climbing to a moderate altitude decreases the maximum uptake by 7% to 8% due to the change in atmospheric pressure. This decrease in oxygen being supplied to the muscles may decrease performance by 4 to 8% depending on the duration of competition, a considerable disadvantage at the finish line.
Even the athlete who prepares and acclimatises well may still not match natives of high altitude areas such as the Andes, who have a larger chest capacity, more alveoli, larger capillary beds and higher red blood cell count. Since people may suffer from altitude sickness when moving from low to high altitudes, sufficient time must also be allowed for these symptoms to disappear before starting intensive training.
WITH MY LOVE
KASIR
