Describe the mechanism of breathing.
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When we inhale the intercostal muscles (between the ribs) and diaphragm contract to expand the chest cavity. ... This reduces the size of the thoracic cavity, thereby increasing the pressure and forcing air out of the lungs.
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breathing is the process of inhaling and exhaling of oxygen .the oxygen is inhaled through nose and is carried to lungs , and carbon dioxide is exhaled out .
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