The breathing following functions:
1- providing the body with oxygen from the air to the lungs, then oxidation in the lungs, thanks to molecular oxygen pressure in the alveoli and blood vessels.
2- put carbon dioxide: thanks to molecular differential pressure him in the cells, veins and alveoli.
3- to maintain a balance of acid base _ or pH.
4- to maintain body heat: as a result of combustion processes and construction and demolition within the body temperature rises internal body thereby acting in a number of ways to get rid of excess heat and these are ways and means: the nervous system, endocrine glands, lungs.
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