Topic Details (Notes format)

Respiration in Organisms

Subject: General Science

Book: NCERT Science Class 7

Respiration is the process of breaking down food to release energy.
- **Types of Respiration**:
1. **Aerobic respiration**: Requires oxygen (Example: Humans, most animals).
2. **Anaerobic respiration**: Does not require oxygen (Example: Yeast, some bacteria).
- **Respiration in Humans**:
- Inhalation: Taking in oxygen-rich air.
- Exhalation: Releasing carbon dioxide.
- Lungs help in gaseous exchange.
- **Respiration in Other Organisms**:
- Fish use gills to breathe.
- Earthworms breathe through their skin.

**Possible Exam Questions:**
1. Differentiate between aerobic and anaerobic respiration with examples.
2. How do fish respire underwater?
3. Explain the role of lungs in human respiration.
4. Why do muscles feel pain after intense exercise?
5. How is respiration in plants different from animals?

Practice Questions

What is the term for water changing from liquid to gas?

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What is the primary function of white blood cells?

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Which metal is liquid at room temperature?

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What is the atomic number of hydrogen?

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Which process describes the splitting of a nucleus into smaller nuclei?

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What is the chemical formula for carbon dioxide?

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What is the function of hemoglobin in the blood?

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Which gas is commonly used in balloons to make them float?

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Which planet has the strongest gravitational force?

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Which process in plants is responsible for the loss of water vapor?

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