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Revision Notes

Hygiene a Key to Healthy Life

ICSE · Class 9 · Biology

Quick revision notes for Hygiene a Key to Healthy Life — ICSE Class 9 Biology. Key concepts, formulas, and definitions for last-minute revision.

44 questions38 flashcards5 concepts

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An infographic illustrating the main categories of hygiene: personal hygiene and social/public hygiene, with key components for each.
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Key Topics to Revise

1

1. Meaning and Branches of Hygiene

  • Hygiene means the science and practice of maintaining good health.
  • It includes caring for one's own body and taking proper care of surroundings.
  • Personal hygiene means keeping the body clean and healthy.
2

2. Personal Hygiene

  • Hands and skin must be cleaned regularly because many objects may carry germs.
  • Washing hands with soap after using toilets is very important.
  • A daily bath keeps the skin clean, removes body odours from perspiration, and keeps sweat pores open.
3

3. Disease Carriers and Their Control

  • Vector is any agent that acts as an intermediate carrier of the pathogen.
  • Housefly, mosquito, and cockroach are the main vectors given maximum priority for control.
  • Housefly is a natural scavenger, but it is also called Public Enemy No. 1 because it spreads many diseases.
4

4. Mosquitoes and the Diseases They Spread

  • Anopheles mosquito spreads malaria in man, monkeys, and birds.
  • The malaria germ is the protozoan Plasmodium.
  • Culex mosquito spreads elephantiasis, also called filariasis.

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Full Notes

Key Concepts

Hygiene is the science and practicePersonal hygiene includes cleanlinessSocial hygiene means keeping public placesA vector is any agentThe housefly is a natural scavenger

Frequently Asked Questions

What are the important topics in Hygiene a Key to Healthy Life for ICSE Class 9 Biology?
Hygiene a Key to Healthy Life covers several key topics that are frequently asked in ICSE Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Hygiene a Key to Healthy Life — ICSE Class 9 Biology?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and 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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