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Question

Identify the structure shown below:

A
Arteries
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B
Pharynx
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C
Alveoli
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D
Capillaries
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Solution

The correct option is C Alveoli
Alveoli are balloon-like structures present in lungs. They provide a large surface area for exchange of gases. Their walls have an extensive network of blood vessels.
Arteries carry oxygenated blood from the heart to all parts of the body.
Air passes through the pharynx into the wind pipe. Both food pipe and wind pipe originate here. It is commonly referred as throat.
Capillaries are the smallest blood vessels in our body where nutrient and waste exchange between blood and tissues takes place.

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