Human Health and Disease — Chapter Summary
ICSE · Class 12 · Biology
Summary of Human Health and Disease for ICSE Class 12 Biology. Part of the ICSE Class 12 Biology syllabus. Human health depends on the proper working.
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Overview
Human health depends on the proper working of the body, while disease means a disturbance in normal structure and function. Human diseases are broadly divided into communicable and non-communicable diseases. Communicable diseases spread from one person to another through direct or indirect transmiss
Key Concepts
Health is a state of complete
Health is a state of complete physical, mental and social well-being and not merely the absence of disease. Good health depends on balanced diet, hygi
Disease is a malfunctioning of body
Disease is a malfunctioning of body organs or disturbance in normal structure and function. It is recognized by a characteristic set of signs and symp
These diseases are caused by specific
These diseases are caused by specific pathogens and can spread from an infected person to a healthy person by direct or indirect transmission. The mai
Pathogens are disease
Pathogens are disease-causing agents. They enter the body through portals such as skin, respiratory tract, digestive tract and urino-genital tract.
Typhoid is caused by Salmonella typhi
Typhoid is caused by Salmonella typhi and confirmed by Widal test; pneumonia is commonly caused by Streptococcus pneumoniae; diphtheria is caused by C
Learning Objectives
- Understand the meaning of health and disease
- Distinguish between communicable and non-communicable diseases
- Identify major disease-causing organisms and their modes of transmission
- Explain the body’s defence mechanisms and the immune response
- Describe innate and acquired immunity, and active and passive immunity
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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