Introduction
Health is wealth, a priceless gem,
A shield against life’s every mayhem.
Our body fights, defends with might,
Against diseases, day and night.
Health and Its Importance
A balanced diet and exercise too,
Keep our body strong and new.
Vitamins, minerals, proteins, and more,
Help in keeping infections at the door.
Types of Diseases: Infectious and Non-Infectious
Some diseases spread, some stay confined,
Pathogens and lifestyle—both combined.
Infectious ones, like flu and cold,
Spread through air, or touch untold.
Non-infectious ones like diabetes stay,
Due to lifestyle, they find their way.
Common Diseases in Humans
Bacterial Diseases
Tuberculosis—lungs feel sore,
Cough and fever, body’s war.
Typhoid comes with fever high,
Widal test tells if it's nigh.
Viral Diseases
Dengue spreads with a mosquito’s bite,
Platelets drop, a fevered fight.
Hepatitis makes the liver weak,
Jaundice turns the skin unique.
Protozoan and Helminth Diseases
Malaria comes from Anopheles’ flight,
Plasmodium makes the blood cells fight.
Elephantiasis swells the limb,
A parasitic worm within so grim.
Immunity: Our Body’s Shield
Innate Immunity
Born with barriers, skin and more,
Mucus traps what’s at the door.
Acquired Immunity
Memory cells recall the fight,
Vaccines train them to do it right.
B cells, T cells—warriors true,
Destroy invaders, make us new.
AIDS and Cancer: The Silent Killers
HIV sneaks, immune cells fade,
AIDS develops, life delayed.
Cancer grows uncontrolled, unkind,
Chemo and therapy hope to bind.
Drugs and Addiction: A Dark Trap
Opioids, alcohol—habits grim,
Weaken bodies, dull the vim.
Prevention, awareness light the way,
To keep the youth from going astray.
Vaccination and Prevention
Polio drops, measles shot,
Immunity builds, sickness fought.
Hygiene, health, and habits bright,
Keep us safe, our future light.
Conclusion
Health’s a treasure, guard it well,
With food and habits, let it dwell.
Diseases lurk, but we shall win,
With science, care, and strength within.
FAQs on Human Health and Diseases
Q1. What is immunity?
Immunity is the body's ability to fight against diseases using defense mechanisms like innate and acquired immunity.
Q2. How does vaccination work?
Vaccines introduce weakened pathogens, training the immune system to recognize and fight real infections.
Q3. What are the causes of cancer?
Uncontrolled cell division due to genetic mutations, exposure to carcinogens, and lifestyle factors.
Q4. How can we prevent communicable diseases?
By maintaining hygiene, getting vaccinated, and avoiding direct contact with infected individuals.
Q5. What are the effects of drug addiction?
It damages physical and mental health, leading to dependency, behavioral changes, and long-term diseases.
Keywords: Human Health and Diseases, Class 12 Biology, NCERT Notes, Immunity, Infectious Diseases, Vaccination, Cancer, AIDS, Drug Addiction, Prevention of Diseases.
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