Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
(a)Explain how, the air we breathe in gets cleaned while passing through the nasal passage.
(b) Why do the walls of trachea not collapse when there is less air in it ?
(c) How are oxygen and carbon dioxide exchanged in our body during respiration?
(d) How are lungs designed in human beings to maximise the exchange of gases?
(a) The nasal passage plays an important role in the purification of air. Nasal passage contains mucus and hair that prevents the dust particles from entering the respiratory tract.
(b) The walls of the trachea do not collapse when there is less air in it because the trachea is supported by rings of soft bones called cartilage.
(c) The alveoli of lungs play a vital role in the exchange of gases. The oxygenated air diffuses from the alveoli into the blood. When the blood is circulated in different parts of the body, the oxygen is carried to all cells and tissues through this blood.
Carbon dioxide is produced as a waste product during respiration. It is diffused into the blood which brings back the carbon dioxide into alveoli and then it is exhaled out of the body through nostrils.
(d) There are millions of alveoli in the lungs of a Human which provides a very large surface area for the exchange of gases. The availability of large surface area maximizes the exchange of gases in Human beings.
Updated on: 24-Mar-2023
15 Views
Advertisements
To Continue Learning Please Login