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Question

________ is a muscular partition that helps in breathing by contracting and flattening, thereby increasing the volume of thoracic cavity.

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Solution

During inhalation, the diaphragm contracts and increases the volume in the thoracic cavity which creates a low pressure region and provides more space to the lungs for expanding. The opposite of this happens during exhalation. The muscular nature of diaphragm allows it to contract and flatten.

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Mechanism of Breathing - concept
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