Why the lungs always contain a residual volume of air?
Why the lungs always contain a residual volume of air?
The lungs always contain a residual volume of air because the process of breathing in multi-cellular organisms, including humans, involves the uptake of oxygen and release of carbon dioxide through the process of respiration. The lungs are a part of this process, and they need to maintain a certain volume of air to facilitate the exchange of gases.
Marking Scheme
- 12 marks
Hint
Think about the process of respiration and the role of lungs in it.
Quick Oral Answer
The lungs always contain a residual volume of air because they need to maintain a certain volume of air to facilitate the exchange of gases during the process of respiration.
Analysis & Explanation
This question requires the student to recall the concept of respiration and the role of lungs in the process. The student should be able to explain why the lungs need to maintain a residual volume of air.
Common Mistakes
- 1thinking that the lungs are empty after exhalation
Interesting Facts
the residual volume of air in the lungs is about 1.2 liters
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2026?
This question carries 2 marks in the CBSE Class 10 Science 2026 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Life Processes" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Respiration" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2026 paper?
This is a Very Short Answer question from Section A in the CBSE Class 10 Science 2026 paper.