Science SSLC (English Medium) Class 5 Tamil Nadu Board of Secondary Education Syllabus 2025-26

• Digestion
• Alimentary Canal 
• Digestive organs

• Respiratory System
• Exchange of Gases in Lungs
• Significance of Respiration

• Blood Circulatory System
• Blood vascular system
• Blood Composition
• Blood Coagulation (Clotting)

• Structure of the Heart
• Layers of the Heart Wall
• Chambers of the Heart
• Valves of the Heart
• Pathway of Blood through the Heart

• Blood Vessels: Structure and Functions
• Capillaries

• Blood Circulation through Heart / Functioning of Heart
• Experiment

• Introduction
• Components of Blood

• Introduction
• Human Excretory System Organs
• Excretion in Humans
• Mechanism of Excretion in Humans
• Dialysis

• Introduction
• Components of Nervous System
• Neuron
• Need of Nervous System

• The major division of The Nervous System

1. Central Nervous System (CNS)
2. Peripheral nervous system (PNS)

• Somatic Nervous System
• Autonomic Nervous System
• Components of the nervous system at a glance

Forebrain: 

1. Olfactory lobes
2. Cerebrum
3. Diencephalon

• Spinal Cord 
• T. S. of spinal cord
• Functions of the spinal cord

• Peripheral Nervous System
• Types of PNS

• Introduction
• Experiment 1
• Experiment 2

• Universal Solvent
• Experiment: To show that ordinary tap water contains dissolved solids.
• Importance of dissolved salts in water.
• Air dissolved in water.
• Experiment: To show that tap water contains dissolved gases (air). 
• Importance of air dissolved in water.

• Introduction to Energy
• Commercial Unit of Energy

• Introduction
• Wind Turbine
• Wind Power
• Uses of Wind Energy

• Introduction
• Applications of Electrical Energy
• Storage of Electrical Energy

• Introduction
• Energy Transfer in The Water Cycle

• Chemical and Physical Changes
• Experiment

• Waste Water
• Effective Methods to Reduce Pollution

• Causes and Prevention of Food Spoilage
• Effects of Storing Food Improperly

• Methods of Food Preservation
• Methods of Food Protection

• Introduction
• Identification of disease

• Categories of Disease

1. Extent of occurrence
   - Endemic diseases
   - Epidemic diseases
   - Pandemic diseases
   - Sporadic diseases
2. Communicability: Communicable or Infectious diseases & Non- Communicable or Non-Infectious diseases
3. Kinds of pathogens
4. Kinds of transmitting agents
5. Congenital diseases and acquired diseases
6. Other types of diseases
   - Infectious diseases
   - Hereditary diseases
   - Physiological diseases
   - Deficiency diseases

• Introduction
• Importance of Water for Sustaining Life

• Water Pollution
• Types of Water Pollutants
• Causes of Water Pollution
• Reasons of Water Pollution

• Waterborne diseases
• Contamination of Water
• Prevention of Waterborne Diseases

• Waterborne Diseases Caused by Bacteria:

1. Diarrhoea
2. Dysentery (Shigellosis)
3. Typhoid Fever Bacteria (Salmonella)
4. Cholera

• Waterborne Diseases Caused by Virus

1. Hepatitus A
2. Hepatitus E

• Vector
• Vector Borne Diseases: Mosquitoes, Cockroaches and Rats

1. Malaria
2. Elephantiasis (filariasis)
3. Yellow fever
4. Dengue

• Control of mosquitoes:

1. Spraying
2. Elimination of breeding places
3. Spraying on stagnant water
4. Biological control

• Introduction
• Reproduction in Plants
• Importance of Variation
• Reproduction in Lower and Higher Animals
• Organisms Create Copies of Themselves

Mode of Reproduction in Plant:

1. Asexual reproduction

2. Sexual reproduction

• Parts of a Flower
• Experiment

• Abiotic Agents
• Biotic Agents

• Double Fertilization 
• Significance of Double Fertilization 
• Syngamy and Triple Fusion

• The seed
• Types of seed
  A) Based on the number of cotyledons two types of seeds are recognized.
  (i) Dicotyledonous seed
  (ii) Monocotyledonous seed
  B) Based on the presence or absence of the endosperm the seed is of two types. 
  (i) Albuminous or Endospermous seed
  (ii) Ex-albuminous or non- endospermous seed
• Significance of Seeds

• Process of Seed and Fruit Development  
• Significance of seed and fruit formation
• Dormancy

• Agricultural seasons
• Agricultural work
• Traditional agriculture

• Proper Care for Optimal Yield
• Dairy Farm Management
• Protecting the Cattle from Diseases
• Livestock Management: Sheep, Goats, and Horses

• Poultry Farm Management
• Components of Poultry Farm Management
• Egg and Broiler Production
• Poultry Disease

• Introduction
• Reproduction in Plants
• Importance of Variation
• Reproduction in Lower and Higher Animals
• Organisms Create Copies of Themselves

• Mode of Reproduction in Animal:

1. Asexual reproduction
2. Sexual reproduction

• Fertilization
• Mechanism of fertilization
• Effect of fertilization
• Significance of fertilization
• Sex determination

• Cleavage
• Blastulation

• Hotspots of Biodiversity
• Endangered Species
• Determination of Endangerment

• Atmosphere
• Layers of Atmosphere
• The Role of Atmosphere In Climate Control

• Air Pollutants and its Effects
• Effect of Air Pollution on Plants and Animals
• Depletion of the Ozone Layer
• Greenhouse Effect and Global Warming
• Acid Rain and its impact
• Effects of Acid Rain

• Airborne Diseases Caused by Virus

1. Hepatitus A
2. Hepatitus E