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प्रश्न
Use your brain power!
How is the air that we inhale purified in our body?
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उत्तर
There are tiny, fine hair-like outgrowths called cilia inside the nose from where the air passes inside. Larger dust particles get caught in these hairs. The air going inside the trachea thus gets filtered. There is also a layer of a sticky substance called mucous. The dust and smoke particles stick to the mucous. Thus, the air that we inhale gets purified before it reaches the lungs.
संबंधित प्रश्न
The cells in our blood which destroy disease-causing germs are ______.
Name the following:
The artery which carries deoxygenated blood.
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Arteries and veins.
Explain the following:
Why is the closed circulatory system more efficient than the open system?
Put a tick mark (✓) against the correct alternative in the following statement.
Pulmonary vein carries
Put a tick mark (✓) against the correct alternative in the following statement.
The blood tastes saltish due to the dissolved.
Fill in the blanks with suitable words given below:
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Describe how the exchange of oxygen and carbon dioxide gases takes place in the lungs.
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______ is an agranulocyte.
