Chapter 17 of 19
Revision Notes
Aids to Health — Revision Notes
ICSE · Class 9 · Biology
Aids to Health revision notes for ICSE Class 9 Biology: 4 topics in quick points. Part of the ICSE Class 9 Biology syllabus.
43 questions38 flashcards5 concepts
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Key Topics to Revise
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1. Need to Keep Healthy and Immunity
- Health depends on personal care and community hygiene.
- Personal care includes washing, bathing, brushing teeth, regular physical exercise, proper diet, proper rest, and sleep.
- Community cleanliness is important because garbage and stagnant water help disease-spreading insects and pests to thrive.
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2. Types of Immunity
- Immunity is classified into innate immunity and acquired immunity.
- Innate immunity is also called natural or native immunity.
- Innate immunity is present without any external stimulation or previous infection.
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3. Antibodies, Antigens, and Antitoxins
- Antibodies are special proteins found in blood and body fluids that react with invading germs.
- Antibodies belong to the class of immunoglobulins.
- Antibodies are produced by specialised lymphocytes when antigens enter the body.
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4. Vaccination and Immunisation
- Vaccination is the practice of artificially introducing germs or germ substance into the body to develop resistance to particular diseases.
- Vaccination is the introduction of dead or weakened germs into the body of a living being to develop immunity against the respective disease or diseases.
- Immunisation means developing resistance to disease-producing germs or their toxins by introducing killed germs or germ substance to induce specific antibody production.
Get complete notes with diagrams and examples
Full NotesKey Concepts
Immunity is the resistance toThe local defence system works firstIf germs enter deeper tissuesActive immunity is produced byPassive immunity is received from outside
Frequently Asked Questions
What are the important topics in Aids to Health for ICSE Class 9 Biology?
Key topics in Aids to Health include Need to Keep Healthy and Immunity, Types of Immunity, Antibodies, Antigens, and Antitoxins, Vaccination and Immunisation. Study these first, then practise questions on each for Class 9 exams.
How should I revise Aids to Health for Class 9 exams?
Learn the core ideas first, then work through the 43 practice questions on Aids to Health. 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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