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Human Body: Respiratory System — Syllabus

ICSE · Class 6 · Biology

What Human Body: Respiratory System covers in ICSE Class 6 Biology: 4 topics, for the 2026-27 session. Part of the ICSE Class 6 Biology syllabus.

94 questions30 flashcards5 concepts

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A detailed labeled diagram of the human respiratory system, showing the pathway of air from the nasal cavity to the alveoli, including the pharynx, larynx, trachea, bronchi, bronchioles, and lungs. Al
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4 Topics · ICSE Class 6 Biology · 2026-27

Topics in Human Body: Respiratory System

1

Main Parts of the Respiratory System

  • The respiratory system consists of the nose, pharynx, larynx, trachea, bronchi, and lungs.
  • The nose filters, warms, and moistens the air we breathe using hair and mucus.
  • The pharynx is a common passage for both air and food.
2

Breathing vs Respiration

  • Breathing is the physical process of taking in oxygen (inhalation) and giving out carbon dioxide (exhalation).
  • Respiration is a biochemical process where cells use oxygen to break down glucose and release energy (ATP).
  • Breathing happens in the lungs; respiration happens in all body cells.
3

Mechanism of Breathing

  • Breathing involves two steps: inhalation and exhalation.
  • During inhalation: ribs move up and out, diaphragm flattens, chest cavity expands, and air rushes in.
  • During exhalation: ribs move down and in, diaphragm becomes dome-shaped, chest cavity shrinks, and air is pushed out.
4

Gaseous Exchange and Transport

  • Oxygen from inhaled air diffuses from alveoli into blood capillaries.
  • Haemoglobin in red blood cells carries oxygen to all body cells.
  • Carbon dioxide, a waste product, diffuses from blood into alveoli and is exhaled.

Key Concepts

Central concept: Respiration

BreathingRespiratory OrgansGaseous ExchangeTypes of RespirationRespiratory DiseasesFunctions of Respiratory Parts

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Frequently Asked Questions

What are the important topics in Human Body: Respiratory System for ICSE Class 6 Biology?
Key topics in Human Body: Respiratory System include Main Parts of the Respiratory System, Breathing vs Respiration, Mechanism of Breathing, Gaseous Exchange and Transport. Study these first, then practise questions on each for Class 6 exams.
How should I revise Human Body: Respiratory System for Class 6 exams?
Learn the core ideas first, then work through the 94 practice questions on Human Body: Respiratory System. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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