Class 4 Exam > Class 4 Videos > English for Class 4 > NCERT Explanation & Solutions: Noses
NCERT Explanation & Solutions: Noses Video Lecture | English for Class 4
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FAQs on NCERT Explanation & Solutions: Noses Video Lecture - English for Class 4
| 1. What is the function of the nose in the human body? |  |
Ans. The nose helps in the process of breathing by taking in oxygen and releasing carbon dioxide. It also plays a role in the sense of smell.
| 2. How does the structure of the nose aid in filtering the air we breathe? | |
Ans. The nose has tiny hairs called cilia and mucus to trap dust, pollen, and other particles in the air, preventing them from entering the respiratory system.
| 3. Can the shape and size of a person's nose affect their breathing ability? | |
Ans. Yes, the shape and size of the nose can impact a person's breathing ability. For example, a deviated septum or narrow nostrils can obstruct airflow and make breathing difficult.
| 4. Why do some people have larger or smaller noses than others? | |
Ans. The size and shape of a person's nose are determined by genetics, with factors such as ethnicity and family history playing a role in the variation of nose sizes among individuals.
| 5. How does the nose play a role in the immune system's response to foreign substances? | |
Ans. The nose acts as a barrier to foreign substances by producing mucus and triggering sneezing to expel irritants. It also contains immune cells that help fight off infections and allergens.
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Nov 22, 2024 Last updated |
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