Human pulmonary or respiratory system — task. Science State Board, Class 8.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Understand the picture and provide answer for the following questions:

1.

768px-Gas_exchange_in_the_aveolus_simple_(en).svg.png

From the above picture which gas enters into the alveolus.

Oxygen
Carbon dioxide
Carbon monoxide
Nitrogen

2.

BeFunky-collage (4).png

When will the diaphragm contracts and moves down?

During sternum pushed up and outward
When air flows out of lungs
When the volume of thoracic cavity decreases
During sternum pushed down and inward

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