pls friend send me the sum
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alveoli
present in the lungs
network structure is capillaries, arteries and veins.they help in exchange of gases such as oxygen and carbon dioxide.if not present the person will die.
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1
Answer:
1.it is bronchi,blood capillary network
2.in lungs
3.it is air exchange network.if it is absent,our body might observe harmful gases and hence,destroy whole human body.
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