You are here
Why is health the ultimate treasure?
We follow healthy habits
Good food, exercise, sleep, and hygiene
↓
Body and surroundings stay clean
Fewer germs and pollutants reach us
↓
Immunity and vaccines protect us
The body fights and prevents disease
↓
Diseases are prevented or managed
Treatment and care when needed
↓
We stay healthy in body, mind, and social life
Health
Class 8 — Chapter 3
3.1
What Is Health?
physical, mental, and social well-being
3.2
How to Stay Healthy
balanced diet, exercise, sleep, clean surroundings
3.3
Signs and Symptoms
symptom is felt; sign is seen or measured
3.4
Types of Diseases
communicable, non-communicable; pathogens, vectors
3.5
Prevent and Control
immunity, vaccines, prevention is better than cure
3.5.1
Treatment
antibiotics for bacteria; antibiotic resistance
Key Terms
- Health
- Complete physical, mental, and social well-being, not just the absence of disease.
- Lifestyle
- The way we live, including our food, exercise, and sleep habits.
- Air Quality Index (AQI)
- A number that tells us how clean or polluted the air is.
- Symptom
- Something we feel when unwell, such as pain or tiredness.
- Sign
- Something that can be seen or measured, such as fever or a rash.
- Disease
- A condition that affects the normal working of the body or mind.
- Pathogen
- A disease-causing organism like a bacterium, virus, fungus, worm, or protozoa.
- Communicable disease
- A disease caused by pathogens that can spread from person to person.
- Non-communicable disease
- A disease not caused by pathogens that does not spread between people.
- Vector
- An insect, like a mosquito, that spreads pathogens.
- Parasite
- An organism that lives in or on another living being and feeds off it.
- Deficiency disease
- A disease caused by a lack of a particular nutrient in the diet.
- Chronic disease
- A disease that lasts a long time, usually more than three months.
- Immunity
- The natural ability of the body to fight diseases.
- Vaccine
- A preparation that trains the immune system to fight a particular disease.
- Acquired immunity
- Protection developed after exposure to a pathogen or a vaccine.
- Antibiotic
- A medicine that kills the bacteria causing a disease.
- Antibiotic resistance
- When bacteria survive an antibiotic that once killed them.
