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Breathing MEchanism, XD

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jericho gatip

on 14 January 2013

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Transcript of Breathing MEchanism, XD

BREATHING Mechanism Guagua National Colleges II- St. Joseph a brief lecture presented to the class of Mrs. Rosemarie Luciano Christian Jersace P. Gatip Definition Breathing takes oxygen in and carbon dioxide out of the body. Aerobic organisms require oxygen to create energy via respiration, in the form of the metabolism of energy-rich molecules such as glucose. The medical term for normal relaxed breathing is eupnea. Breathing is only part of the processes of delivering oxygen to where it is needed in the body and removing carbon dioxide waste. The process of gas exchange occurs in the alveoli by passive diffusion of gases between the alveolar gas and the blood passing by in the lung capillaries. Once in the blood the heart powers the flow of dissolved gases around the body in the circulation.

Control Breathing is one of the few bodily functions which, within limits, can be controlled both consciously and unconsciously. CONSCIOUS Conscious control of breathing is common in many forms of meditation, specifically forms of yoga for example pranayama unlike anapana which is only awareness of breath. In swimming, cardio fitness, speech or vocal training, one learns to discipline one's breathing, initially consciously but later sub-consciously, for purposes other than life support. Human speech is also dependent on conscious breath control. UNCONSCIOUS Unconsciously, breathing is controlled by specialized centers in the brainstem, which automatically regulate the rate and depth of breathing depending on the body’s needs at any time. When carbon dioxide levels increase in the blood, it reacts with the water in blood, producing carbonic acid. Lactic acid produced by anaerobic exercise also lowers pH. The drop in the blood's pH stimulates chemoreceptors in the carotid and aortic bodies in the blood system to send nerve impulses to the respiration centre in the medulla oblongata and pons in the brain. These, in turn send nerve impulses through the phrenic and thoracic nerves to the diaphragm and the intercostal muscles, increasing the rate of breathing. Even a slight difference in the bloods normal pH, 7.4, could cause death, so this is an important process. Composition Location and Man's respiratory system is located mostly inside the chest cavity. this is enclosed by the ribs and a sheet of muscle, called diaphragm at the bottom. Respiration Respiration, meaning gas exchange, is the process in which an organism absorbs from the environment gases necessary for its cellular metabolism and expels gases that are products of this metabolism. or Inhalation Inspiration During inspiration, the outer intercostal muscles contract, which raises the chest cavity or the ribs. This is accompanied by the lowering of the diaphragm. Together these movements serve to increase the area of the thoracic cavity, which reduces the pressure. The air from outside rushes into the lungs.

After the internal respiration in the lungs, the impure air is expelled in the following manner:

expiration This is the process of The inner intercostal muscles contract bringing the ribs back to the original position and the diaphragm is also raised back by the action of the abdominal muscles. This reduces the space in the chest cavity and increases the pressure. This expels the air out of the lungs.

After the internal respiration in the lungs, the impure air is expelled in the following manner:

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