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Science
Class 9

ICSE · Class 9 · Biology

Health and Hygiene

Chapter 7ICSE · Class IX · examination 2028

4 worlds · 1 lab for this chapter.

Topics

Disease and defence
- Disease categories and transmission
- Bacterial, viral, protozoan and helminthic diseases
- Vaccination and immunity
- Antiseptics, disinfectants and antibiotics
- Red Cross and WHO

Learning objectives

Match a disease-prevention measure to its transmission route.

Worlds

Places to explore freely · 4 worlds

WorldInside the BloodShrink into a vessel and ride a red cell from your lungs to a muscle
WorldNutrition & HealthPaint a week of sleep, plates, water and play and let one body live it five minutes at a time: sleep debt that fogs Friday, a screen that keeps you awake in the dark, the mid-morning slide without breakfast, the sugar crash, a heatwave on three glasses, stamina, a cold going round, a homework mountain, a growing body — and six dials scored from the week you lived
WorldMicroorganismsCulture a population that lags, doubles and starves; count it by dilution and plating; sterilise a spore and pasteurise milk by D-values; find the antibiotic dose, finish the course, watch one resistant cell take over an under-dosed wound, clear it with two drugs, wash your hands properly, and run a ward for thirty days
WorldThe Immune SystemCommand a lymph node under siege from one war table — press the WANTED poster, muster the one recruit whose notch fits, and watch a wrong order fail in front of you

Main lab

Built for this chapter · 1 lab

Main labWhy Do We Fall IllBiology

Practice

Questions for Class 9 Biology, with worked answers, on screen or as a printed paper.

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