Human Health and Diseases — Chapter Summary
Tamil Nadu Board · Class 12 · Zoology
Summary of Human Health and Diseases for Tamil Nadu Board Class 12 Zoology. Key concepts: Infectious diseases are, Non and Bacterial diseases are caused.
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Overview
Health, as defined by the World Health Organization, is not merely the absence of disease but a state of complete physical, mental, and social well-being. This chapter explores the various diseases affecting human beings, their causative agents, transmission methods, and prevention strategies. Under
Key Concepts
Infectious diseases are disorders transmitted from
Infectious diseases are disorders transmitted from one infected person to another through various modes including air (droplet infection), water, food
Non
Non-infectious diseases are not transmitted from person to person but originate from genetic factors (cystic fibrosis), nutritional deficiencies (vita
Bacterial diseases are caused by pathogenic
Bacterial diseases are caused by pathogenic bacteria that emit toxins affecting the body. Common bacterial diseases include shigellosis (dysentery) fr
Viruses are the smallest obligate intracellular
Viruses are the smallest obligate intracellular parasites that multiply only within living cells. Common viral diseases include common cold (Rhino vir
About 15 genera of protozoans live
About 15 genera of protozoans live as parasites within the human body. Major protozoan diseases include: (1) Amoebiasis caused by Entamoeba histolytic
Learning Objectives
- Understand various bacterial, viral, fungal, protozoan, and helminthic diseases that affect humans
- Learn the life cycle of malarial parasite (Plasmodium) and its transmission mechanism
- Recognize the ill effects of drugs and alcohol on the human body and mind
- Develop responsibility for personal health care, hygiene practices, and healthy lifestyles
- Understand the importance of mental health and implement lifestyle modifications for overall well-being
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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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