Biology · Class 12 · Chapter 7
Human Health and Disease
13 lessons110 min6 simulations10 practice questions
This chapter asks what keeps a body healthy and what makes it sick. It surveys the common infectious diseases and the pathogens behind them, then builds the immune system from its innate barriers to antibodies, memory, vaccines, allergy and the lymphoid organs, and closes with AIDS, cancer, and the abuse of drugs, tobacco and alcohol.
Also called: immunity · immune system · diseases · cancer and AIDS
Lessons
13 lessons · 110 min
01Health and diseaseNCERT §7 (chapter introduction)6 min02Bacterial and viral diseasesNCERT §7.17 min03Malaria and amoebiasisNCERT §7.110 min1 sim04Worms, fungi and preventionNCERT §7.17 min05Innate immunityNCERT §7.2, §7.2.16 min06Acquired immunityNCERT §7.2.210 min1 sim07Active and passive immunityNCERT §7.2.3, §7.2.49 min1 sim08Allergy and auto-immunityNCERT §7.2.5, §7.2.66 min09Lymphoid organsNCERT §7.2.79 min1 sim10AIDSNCERT §7.310 min1 sim11CancerNCERT §7.410 min1 sim12Drugs, alcohol and addictionNCERT §7.57 min13Chapter reviewMust-know facts, traps and formulas13 min
Simulations
6 in this chapter
The two-host life cycle of PlasmodiumIn: Malaria and amoebiasisImmune memory: primary and secondary responsesIn: Acquired immunityActive and passive immunity: fast but fading, or slow with memoryIn: Active and passive immunityA lymphocyte's journey: primary and secondary lymphoid organsIn: Lymphoid organsHIV: years of silent declineIn: AIDSContact inhibition, lostIn: Cancer