The Respiratory System — Chapter Summary
ICSE · Class 9 · Biology
Summary of The Respiratory System for ICSE Class 9 Biology. Part of the ICSE Class 9 Biology syllabus. Respiration is the chemical process of releasing.
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Overview
Respiration is the chemical process of releasing energy by breaking down glucose for carrying out life processes. In humans, respiration includes breathing, gaseous transport, tissue respiration, and cellular respiration. Breathing brings air in and out of the lungs, while cellular respiration insid
Key Concepts
Respiration is the chemical process
Respiration is the chemical process of releasing energy by breaking down glucose for carrying out life processes. It happens inside living cells and i
Aerobic respiration uses oxygen to break
Aerobic respiration uses oxygen to break down glucose completely into carbon dioxide and water. It releases a large amount of energy and produces 38 A
Anaerobic respiration happens without oxygen
Anaerobic respiration happens without oxygen in fast-working skeletal muscles. It produces lactic acid, 2 ATP, and heat energy, but no carbon dioxide.
Breathing is the physical process
Breathing is the physical process of inhaling and exhaling air. It is only one part of respiration and is controlled by the diaphragm and intercostal
The nose
The nose, pharynx, larynx, trachea, bronchi, and bronchioles form the air passages. They warm, moisten, filter, and carry air to the lungs.
Learning Objectives
- Understand the meaning and importance of respiration
- Identify the main organs of the human respiratory system
- Explain the path of air through the respiratory passages
- Describe how breathing happens during inspiration and expiration
- Distinguish between breathing, gaseous transport, tissue respiration, and cellular respiration
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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