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respiratory system (organ of respiratory tract and location (diaphragm…
respiratory system
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breathing mechanism
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inspiration
diaphragm and intercostal muscles contract, thoracic cavity increases in size, air is pulled into lungs due to increased volume
expiration
passive process that depends on the natural elasticity of lungs, muscles relax and air is pushed out of the lungs, forced expiration occurs by contracting intercostal muscles to depress rib cage
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