9. State the role of following parts of human respiratory system (i) N – InterviewSolution

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1.	9. State the role of following parts of human respiratory system (i) Nasal cavity (ii) Diaphragm (iii) Alveoli
Answer» tion:(II) Diaphragm It is a MUSCULAR partition between the thoracic and abdominal region in our BODY. Movement of diaphragm helps in the breathing process. (III) Alveoli These are balloon-like structures, which increases the surface area for the gaseous exchange in lungs.

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