Class 10 Science - TAMILNADU
Health and Diseases
The Class 10 Samacheer Kalvi Science chapter 'Health and Diseases' explores the fundamental concepts of human health, balanced diet, and various types of diseases. Students learn about communicable and non-communicable diseases, causative agents like bacteria, viruses, fungi, and protozoans, and their modes of transmission. The chapter also covers major human ailments such as cancer, diabetes, cardiovascular diseases, and addiction-related disorders. It highlights preventive measures, hygiene, and the role of the immune system. This chapter is highly important for the Tamil Nadu SSLC board examination, as it consistently features conceptual questions, matching exercises, and direct short-answer questions.
Start Learning FreeKey Concepts
Health and Disease
Health is a state of complete physical, mental, and social well-being, while a disease is a condition that disrupts the normal functioning of the body or mind.
Communicable Diseases
Infectious diseases that can be easily transmitted from an infected person to a healthy person through air, water, vectors, or direct contact, caused by pathogens like bacteria and viruses.
Non-Communicable Diseases
Diseases that do not spread from person to person, often caused by genetic factors, lifestyle choices, or environmental influences, such as cancer and diabetes.
Vectors and Pathogens
Pathogens are disease-causing organisms (e.g., Plasmodium), while vectors are organisms like mosquitoes that transfer pathogens from one host to another.
Lifestyle Diseases
Medical conditions resulting from daily habits, poor diet, lack of physical activity, and substance abuse, including obesity, hypertension, and alcoholism.
Important Formulas
Board Exam Info
In the Tamil Nadu (Samacheer Kalvi) Class 10 Science board exam, this chapter typically carries around 4 to 6 marks. Questions usually include 1-mark objective questions, 2-mark or 4-mark short answers asking for causative agents and symptoms of specific diseases, and differentiation questions between communicable and non-communicable diseases.
Frequently Asked Questions
What is the difference between communicable and non-communicable diseases?
Communicable diseases spread from one person to another through pathogens (like tuberculosis or malaria), whereas non-communicable diseases do not spread between individuals and are caused by lifestyle, genetics, or deficiencies (like cancer or diabetes).
How can we prevent vector-borne diseases like dengue and malaria?
Vector-borne diseases can be prevented by avoiding stagnant water to stop mosquito breeding, using mosquito nets, applying insect repellents, and maintaining proper sanitation.
What causes addiction, and what are its effects?
Addiction is caused by the habitual psychological and physical dependence on substances like alcohol, tobacco, or drugs. It severely damages internal organs like the liver and brain, and negatively affects social and mental well-being.
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