Explain in short mechanism of breathing in humans.
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:-The mechanism of breathing involves two main processes: inspiration and expiration. ... Expiration occurs when the diaphragm and the intercostal muscles relax. The contraction or relaxation of muscles around the lungs changes the entire volume of air inside the lungs, and so does the pressure
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In order for air to be drawn into the lungs during inhalation the volume of the thorax must increase. This is brought about due to the contraction of respiratory muscles. ... The diaphragm relaxes and moves up and the relaxation of the intercostal muscles moves the ribs in and down.
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