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Respiratory System — BIOLOGY STD 9 — Question

ICSE BoardEnglish MediumSTD 9BIOLOGYRespiratory System2 Marks
Question
Discuss the function of the diaphragm in breathing.
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Answer

The function of diaphragm: It helps in breathing by contracting and relaxing thereby increase and decrease the volume of the thoracic cavity. During inspiration, the diaphragm flattens while during expiration it becomes dome-shaped.

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