NEET Biology Health and Diseases Notes

Read and download the NEET Biology Health and Diseases Notes. Designed for 2025-26, this advanced study material provides NEET Biology students with detailed revision notes, sure-shot questions, and detailed answers. Prepared by expert teachers and they follow the latest NEET, NCERT, and KVS guidelines to ensure you get best scores.

Advanced Study Material for NEET Biology Health and Diseases

To achieve a high score in Biology, students must go beyond standard textbooks. This NEET Health and Diseases study material includes conceptual summaries and solved practice questions to improve you understanding.

NEET Biology Health and Diseases Notes and Questions

 

World health day – 7th April
Health : A state of complete physical, social and mental well being.
Disease : Disease, means not at ease, or health disorder. The health is affected by
(i) Inheritance,
(ii) Infection, and
(iii) Life style; the latter includes intake, habits and exercises etc.
 
Diseases can be classified in 3- different ways-
 
A. Non-ccommmmuniiccaabllee diiseeaasees aand Commmuniicaable diiseeases (Followweed in this book)
B. Congenital diseases and acquired diseases
C. Heritable and non-heritable diseases
 
I. NON- COMMUNICABLE DISEASES
 
1. Deficiency disorders – Kwashiorkar, Marasmus, Beri - Beri, Scurvy, Nyctalopia, Myxoedema, Diabetes etc.
2. Allergic diseases – Asthma, Hay-fever, Urticaria etc. (see Immunity part in this chapter)
3. Autoimmunity diseases – Hashimoto’s disease, Rheumatic heart disease, Myasthenia gravis etc. (see Immunity)
4. Hereditary diseases – PKU, ALK, Haemophilia, Sickle cell anemia, Huntington’s chorea, Colourblindness.
5. Degenerative or Organic diseases – Arthritis, Coronary thrombosis, Arteriosclerosis, Respiratory diseases, Heart disorders (already discussed with concerned systems) and cancer (dealt separately) etc.
6. Injury diseases – Sprain, Fracture and Burn etc.
7. Other diseases – Occupational diseases, Leucoderma, Obesity, and diseases due to hyper secretion of hormones, Addictions, Mental disorders.
 
II. COMMUNICABLE DISEASES
 
These diseases are caused by pathogens and can be transmitted from one organism to another, and are, therefore, also called as infectious diseases.
A particular organism is pathogen or not, can be established on the conditions laid down by Robert Koch (1876)- a German microbiologist, who worked on Anthrax disease in a sheep.
These conditions are called Koch’s postulates :
1. A diseased animal should regularly have that microorganism
2. The organism could be isolated and cultured on artifi cial or nutrient medium
3. By inoculation of that culture the same disease should appear in a healthy animal
4. The same microorganism should be recoverable from the body of inoculated animal or person
Koch’s postulates are, however, not applicable to viral diseases as the viruses can not be cultured on artifi cial media. The bacteria of the disease Leprosy can also not be cultured on artifi cial medium, so this bacteria also does not follow Koch’s postulates.
 
• Important terms or points about communicable diseases :
 
• Etiology – Study of causes of diseases
• Epidemics – Out break of disease in a major portion of a population (Mahamari)
• Epidemology – Study of mode of transmission of diseases
• John Snow – Father of epidemology, and studied epidemic of Asiatic cholera in London
• L. Pasteur and Robert Koch – proposed ‘Germ theory of diseases’.
• L. Pasteur – Developed vaccine against Rabies
• Robert Koch – Koch’s postulates (Described above)
 
 
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NEET NEET Biology Health and Diseases Study Material

Students can find all the important study material for Health and Diseases on this page. This collection includes detailed notes, Mind Maps for quick revision, and Sure Shot Questions that will come in your NEET exams. This material has been strictly prepared on the latest 2026 syllabus for NEET Biology. Our expert teachers always suggest you to use these tools daily to make your learning easier and faster.

Health and Diseases Expert Notes & Solved Exam Questions

Our teachers have used the latest official NCERT book for NEET Biology to prepare these study material. We have included previous year examination questions and also step-by-step solutions to help you understand the marking scheme too. After reading the above chapter notes and solved questions also solve the practice problems and then compare your work with our NCERT solutions for NEET Biology.

Complete Revision for Biology

To get the best marks in your NEET exams you should use Biology Sample Papers along with these chapter notes. Daily practicing with our online MCQ Tests for Health and Diseases will also help you improve your speed and accuracy. All the study material provided on studiestoday.com is free and updated regularly to help NEET students stay ahead in their studies and feel confident during their school tests.

What is included in the advanced study material for NEET Biology Chapter Health and Diseases?

Our advanced study package for Chapter Health and Diseases includes detailed concepts, diagrams, Mind Maps, and explanation of complex topics to ensure NEET students learn as per syllabus for 2026 exams.

How do Mind Maps for Biology Chapter Health and Diseases help in revision?

The Mind Maps provided for Chapter Health and Diseases act as visual anchors which will help faster recall during high-pressure exams.

Are these Biology resources suitable for both classroom teaching and self-study?

Yes, teachers use our NEET Biology resources for lesson planning as they are in simple language and have lot of solved examples.

Is this advanced study material for Chapter Health and Diseases free to download in PDF?

Yes, You can download the complete, mobile-friendly PDF of the Biology Chapter Health and Diseases advanced resources for free.

Does this material cover rationalized content for the 2025-26 NEET session?

Yes, our subject matter experts have updated the Chapter Health and Diseases material to align with the rationalized NCERT textbooks and have removed deleted topics and added new competency-based questions.