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Human Diseases

Telangana Open School (TOSS) · Class 12 · Biology

Quick revision notes for Human Diseases — Telangana Open School (TOSS) Class 12 Biology. Key concepts, formulas, and definitions for last-minute revision.

48 questions30 flashcards5 concepts

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Key Topics to Revise

1

Types of Diseases

  • Disease is any condition that disrupts normal body function.
  • Two main types: Congenital (present at birth) and Acquired (develop during life).
  • Acquired diseases are further divided into communicable and non-communicable.
2

Communicable Diseases and Transmission

  • Caused by pathogens like bacteria, viruses, protozoa, fungi, and worms.
  • Spread through direct contact (touch, droplets, animal bites) or indirect means (vectors, water, air, objects).
  • Vectors like mosquitoes and houseflies carry pathogens from host to host.
3

Major Infectious Diseases

  • Influenza: Caused by virus, spreads via droplets, symptoms include fever, cough, body ache.
  • Measles: Viral, highly contagious, causes rashes and fever.
  • Polio: Viral, affects nervous system, can cause paralysis.
4

Non-Communicable Diseases

  • Degenerative diseases: Due to organ malfunction, e.g., heart failure.
  • Deficiency diseases: Caused by lack of nutrients, e.g., anemia (iron), beriberi (vitamin B1).
  • Allergies: Overreaction of immune system to harmless substances like dust or pollen.

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Full Notes

Key Concepts

A disease is any conditionThese are infectious diseases caused byThese do not spread between peoplePathogens are diseaseCancer is the uncontrolled growth

Frequently Asked Questions

What are the important topics in Human Diseases for Telangana Open School (TOSS) Class 12 Biology?
Human Diseases covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Human Diseases — Telangana Open School (TOSS) Class 12 Biology?
Understand the core concepts first, then work through the 48 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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