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Explain in detail the mechanism of breathing.Discuss briefly about respiration and acid base balance. Discuss briefly about...

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Biology

Explain in detail the mechanism of breathing.Discussbriefly about respiration and acid base balance. Discuss brieflyabout the structural layers of alimentary tube.

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3.6 Ratings (398 Votes)
Mechanism of breathing Breathing consists of two phases called inspiration and expiration InspirationIn order for air to be drawn into the lungs during inspiration the volume of the thorax must increase This is brought about due to the contraction of respiratory muscles The diaphragm contracts and flattens and the intercostal muscles contract to pull the ribs up and out The increased volume within the thoracic cavity lowers the pressure within the lungs with respect to the atmospheric pressure Consequently air is drawn into the    See Answer
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