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Respiratory Organs & Human Respiratory System Video Lecture | Biology A-Level - A Level

FAQs on Respiratory Organs & Human Respiratory System Video Lecture - Biology A-Level - A Level

1. What are the respiratory organs in the human body?

Ans. The respiratory organs in the human body include the nose, pharynx, larynx, trachea, bronchi, and lungs. These organs work together to facilitate the process of respiration.

2. How does the human respiratory system function?

Ans. The human respiratory system functions by bringing in oxygen from the air and expelling carbon dioxide. When we inhale, air enters through the nose or mouth, then passes through the pharynx, larynx, trachea, and bronchi before reaching the lungs. In the lungs, oxygen is exchanged with carbon dioxide through the alveoli, enabling oxygenation of the blood.

3. What is the role of the nose in the human respiratory system?

Ans. The nose plays a crucial role in the human respiratory system. It acts as the primary entrance for air, filtering and humidifying it before it reaches the lungs. The nose also contains tiny hair-like structures called cilia, which help to trap dust particles and other impurities from the air we breathe.

4. How does the human respiratory system protect itself from harmful substances?

Ans. The human respiratory system has several mechanisms to protect itself from harmful substances. Firstly, the nose filters out large particles and impurities present in the air. Additionally, the respiratory system produces mucus, which helps to trap smaller particles and pathogens. Cilia present in the respiratory tract then move the mucus and trapped particles upward towards the throat, where they can be expelled through coughing or swallowing.

5. What are some common respiratory disorders?

Ans. Some common respiratory disorders include asthma, chronic obstructive pulmonary disease (COPD), bronchitis, pneumonia, and lung cancer. These disorders can affect the normal functioning of the respiratory system and may require medical intervention and treatment. It is essential to maintain a healthy respiratory system through regular exercise, avoiding smoking, and minimizing exposure to pollutants.

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Sep 09, 2025 Last updated

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279 videos|173 docs|152 tests

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