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प्रश्न
Use your brain power!
How is the air that we inhale purified in our body?
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
Which side of the heart (left or right) contains oxygenated blood?
Heart sounds are produced due to ______.
-
closure of tricuspid and bicuspid valves
-
rushing of blood through valves producing turbulence
-
closure of atrioventricular and semilunar valves
-
entry of blood into auricles
Given below is a certain structure, write its chief functional activity.
Blood platelets - ______.
What is Endothelium?
How do you account for the following difference?
The left ventricle has thicker walls than the right ventricle.
Match the items given in Column A with the most appropriate ones in Column B and REWRITE the correct matching pairs :
Column A Column B
(i) Cranial nerves Testosterone
(ii) Leydig cells Natural reflex
(iii) Acetylcholine 12 pairs
(iv) Spinal nerves Prolactin
(v) Sneezing Neurotransmitter
- 18 pairs
- 31 pairs
- Conditioned reflex
Fill in the blanks with suitable words given below:
The ______ artery takes the blood from the ventricles to the lungs.
Name the main parts of the circulatory system
What are seen as greenish blue lines in our hands and legs?
A female has haemophilic brother and parents having nonual blood clotting. She marries a male who has no history of haemophilia in his family. What is the possibility of her children having this disease?
