CISCE ICSE Class 8 Biology Syllabus - Free PDF Download
CISCE Syllabus 2025-26 ICSE Class 8: The CISCE ICSE Class 8 Biology Syllabus for the examination year 2025-26 has been released by the Council for the Indian School Certificate Examinations, CISCE. The board will hold the final examination at the end of the year following the annual assessment scheme, which has led to the release of the syllabus. The 2025-26 CISCE ICSE Class 8 Biology Board Exam will entirely be based on the most recent syllabus. Therefore, students must thoroughly understand the new CISCE syllabus to prepare for their annual exam properly.
The detailed CISCE ICSE Class 8 Biology Syllabus for 2025-26 is below.
Academic year:
CISCE ICSE Class 8 Biology Revised Syllabus
CISCE ICSE Class 8 Biology and their Unit wise marks distribution
CISCE ICSE Class 8 Biology Course Structure 2025-26 With Marking Scheme
| # | Unit/Topic | Weightage |
|---|---|---|
| 1 | Transportation in Plants | |
| 2 | Reproduction in Plants | |
| 3 | Reproduction in Humans | |
| 4 | Ecosystems | |
| 5 | Human Body: Endocrine System | |
| 6 | Human Body: Circulatory System | |
| 7 | Human Body: Nervous System | |
| 8 | Health and Hygiene | |
| 9 | Food Production | |
| Total | - |
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Syllabus
1 Transportation in Plants
- Transport System in Plants
- Permanent Tissue
- Absorption and Conduction of Water and Minerals
- Diffusion
- Meaning
- Experiment
- Concept of Osmosis
- Meaning
- Forms
- Experiments
- Duration of Osmosis
- Diffusion
- Translocation of Water (Ascent of Sap)
- Root Pressure Theory (Vital Theory)
- Capillarity theory (physical force theory)
- Cohesion-tension theory (Transpiration pull theory)
- Adhesion
- Root Pressure
- Guttation
- Transpiration
- Factors Affecting the Rate of Transpiration
- Significance of Transpiration
2 Reproduction in Plants
- Mode of Reproduction in Plant
- Sexual Reproduction in Plants
- Pollination
- Definition: Pollination
- Agents of Pollination
- Fertilisation in Flowering Plants
- Artificial Pollination
3 Reproduction in Humans
- Mode of Reproduction in Animal
- Mode of Reproduction in Animal:
- Asexual reproduction
- Sexual reproduction
- Sexual Reproduction in Animals
- Fertilization in Human
- Maturation and capacitation of spermatozoa
- Structure of ovum
- Coitus
- Egg Types
- Passage of sperm in female genital tract
- Ovum-sperm interaction in fallopian tube
- Fertilization of the ovum
- From Egg to Embryo
- Implantation in Human
- Implantation in Humans
- Implantation duration and process
- Implantation bleeding
- Pregnancy in Humans
- First Trimester
- Second Trimester
- Third (final) Trimester
4 Ecosystems
- Forests: Our Lifeline
- Forest Biology
- Forest Biodiversity
- Crown
- Canopy
- Understorey
- Forest Ecosystem
- Spatial pattern: Stratification and zonation
- Concept of Ecosystem
- Structure and Function of an Ecosystem
- Abiotic Factors
- Biotic Factors
- Interaction Between Biotic and Abiotic Factors
- Complexity of Ecosystems
- Biomes: Large Ecosystems
- Structure and Function of an Ecosystem
- Food Chain
- Concept of Food Chain
- Advantages of Food Chain
- Food Web
- Concept of Food Web
- Advantages of Food Web
- Energy Pyramid
- Trophic Level
- Pyramid of Energy
- Risks to Ecosystem
- Need to Restore and Conserve the Ecosystems
5 Human Body: Endocrine System
- Chemical Coordination
Chemical Coordination
- Autocrine
- Paracrine
- Endocrine
- Pheromone
- Human Endocrine System
Human Endocrine System
- Properties of Hormones
- Mechanism of hormone action
- Human Endocrine Glands
- Thyroid Gland
- Thyroid gland: Isthmus, Follicles and stromal tissues, tetraiodothyronine or thyroxine (T4), triiodothyronine (T3), thyrocalcitonin (TCT), Iodine
- Functions of thyroid hormones
- Disorders related to thyroid gland
- Hyperthyroidism
- Hypothyroidism
- Adrenal Gland (Suprarenal Gland)
Adrenal Gland
- Hormones and functions of adrenal gland
(i) Adrenal cortex: Zona reticularis, Zona Fasciculata, Zona reticularis - Disorders related to Adrenal cortex: Hyposecretion, Hyper secretion
(ii) Adrenal medulla: Adrenaline, Nor-adrenaline, Catecholamines, emergency hormones or hormones of fight or flight
- Hormones and functions of adrenal gland
- Pancreas (Islets of Langerhans)
- Pancreas (Islets of Langerhans): α-cells and β-cells
(i) Insulin
(ii) Glucagon - Other hormone secreting cells of islets of Langerhans
(i) Delta or D cells
(ii) F cells - Disorders related to pancreas
-Diabetes mellitus (Hyperglycemia)
- Pancreas (Islets of Langerhans): α-cells and β-cells
- Pituitary Gland or Hypophysis Gland
- Pituitary gland
- Division of pituitary gland
(i) Adenohypophysis (anterior pituitary): Pars distalis, pars tuberalis
(ii) Neurohypophysis (posterior pituitary): Pars nervosa, infundibulum, MSH (Melanocyte Stimulating Hormone) - Hormones of adenohypophysis/ hormones of pars distalis:
(i) Growth Hormone (GH)
(ii) Thyroid-stimulating hormone (TSH)
(iii) Adrenocorticotropic hormone (ACTH)
(iv) Prolactin
(v) Follicle-stimulating hormone (FSH)
(vi) Luteinizing hormone (LH) - Hormones of neurohypophysis
- Thyroid Gland
- Concept of Adolescence
- Introduction
- Meaning
- Stages of Adolescence
- Development of Sexual and Secondary Sexual Characters
- Physical Changes during Adolescence
- Emotional and Social Changes
- Adolescence as a Phase
- Physical Changes
- Adolescence and the Related Psychological Changes
- Types of Hygiene: Personal Hygiene
- Personal Hygiene
- Major aspect of personal hygiene
- Cleanliness
- Physical exercise
- Rest and sleep
- Healthy habits
- Stress Management
6 Human Body: Circulatory System
- Circulation in Animals
- Circulation
- Blood vascular system
- Types of blood vascular system
- Open circulation
- Closed circulation
- Fluids in Our Body
- Fluids in Our Body
- Blood
- Tissue fluid
- Lymph
- Blood Circulatory System in Human
- Blood Circulatory System
- Blood vascular system
- Blood Composition
- Blood Coagulation (Clotting)
- Human Heart
- 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
- Blood Vessels: Structure and Functions
- Capillaries
- Circulation of Blood in the Heart (Functioning of Heart)
- Blood Circulation through Heart / Functioning of Heart
- Experiment
- Pacemaker
- Working mechanism of human heart
- Cardiac Cycle
- Atrial systole (AS)
- Ventricular systole (VS)
- Cardiac output (CO)
- Types of Closed Circulation
- Types of Closed Circulation:
- Single circulation
- Double circulation
- Systemic circulation
- Pulmonary circulation
- Coronary circulation
- Hepatic Portal System
- Tissue Fluid (Or Intercellular Fluid)
- Lymph and Lymphatic System
- Lymph and Lymphatic System
- Composition of Lymph
- Functions of Lymph
- Blood Transfusion and Blood Groups (ABO and Rh system)
- Human Blood Groups
- Rh Factor
- Blood Donation
- Blood Banks
- Blood Donor
- Blood Recipient
- Heart Related Conditions
- Keeping the Heart Healthy
7 Human Body: Nervous System
- Control and Co-ordination
- Control and Co-ordination in Human Being
- Human Nervous System
- Introduction
- Components of Nervous System
- Neuron
- Need of Nervous System
- Neuron (Or Nerve Cell) and Its Types
- Neuron
- Types of neurons
- Unipolar neurons
- Bipolar neurons
- Multipolar neurons
- Sensory or afferent neurons
- Motor or efferent neurons
- Association (connecting) neurons
- Nerve
- Types of Nerve
- Sensory nerves
- Motor nerves
- Mixed nerves
- Difference between Neuron and Nerve
- Nerve Fibres
- Nerve Fibres
- Properties of nerve fibres
- Types of Nerve Fibres
- Myelinated nerve fibre
- Non-myelinated nerve fibre
- Major Division of the Nervous System
- The major division of The Nervous System
- Central Nervous System (CNS)
- Peripheral nervous system (PNS)
- Somatic Nervous System
- Autonomic Nervous System
- Components of the nervous system at a glance
- Central Nervous System (CNS)
- Central Nervous System
- Different regions of Brain and its functions
- The Human Brain - Forebrain
Forebrain:
- Olfactory lobes
- Cerebrum
- Diencephalon
- The Spinal Cord
- Spinal Cord
- T. S. of spinal cord
- Functions of the spinal cord
- Peripheral Nervous System (PNS)
- Peripheral Nervous System
- Types of PNS
- Reflex and Reflex Action
- Reflexes
- Types of actions
- Voluntary actions
- Involuntary actions
- Types of Reflexes
- Natural (inborn) reflex
- Conditioned (or acquired) reflex
- Pavlov's experiment on a dog
- Reflex Arc
- Various terms associated with reflex arc:
- Receptor
- Sensory neuron
- Central nervous system
- Motor neuron
- Effector
8 Health and Hygiene
- Health
- Introduction
- Physical Health
- Mental Health
- Hygiene
- Introduction
- The Importance of Hygiene for Health and Well-being
- Disease
- Introduction
- Identification of disease
- Categories of Disease
- Categories of Disease
- Extent of occurrence
- Endemic diseases
- Epidemic diseases
- Pandemic diseases
- Sporadic diseases - Communicability: Communicable or Infectious diseases & Non- Communicable or Non-Infectious diseases
- Kinds of pathogens
- Kinds of transmitting agents
- Congenital diseases and acquired diseases
- Other types of diseases
- Infectious diseases
- Hereditary diseases
- Physiological diseases
- Deficiency diseases
- Spread of Communicable Diseases
- Common Diseases in Human Beings
- Viral Diseases
- Introduction
- Common diseases
- Viral Diseases
- Viral Diseases
- Vector Borne Diseases
- Vector
- Vector Borne Diseases: Mosquitoes, Cockroaches and Rats
- Malaria
- Elephantiasis (filariasis)
- Yellow fever
- Dengue
- Control of mosquitoes:
- Spraying
- Elimination of breeding places
- Spraying on stagnant water
- Biological control
- Principles of Prevention of Diseases
- Vaccination and Immunization
- Vaccination
- Immunization
- First Aid and Emergency Action
- First Aid
- Basic Principles of First Aid
- Simple Steps for Providing First Aid in Different Situations
- Tobacco Abuse
- Tobacco Consumption
- Ill Effects of Tobacco Addiction
- The Importance of Avoiding Tobacco
- Alcohol Abuse
- Alcohol Consumption
- Effect of Alcohol Addiction
- Prevention and Control of Alcohol
9 Food Production
- Microorganisms (Microbes) and Microbiology
- Introduction of Microorganisms
- Types of Microorganisms
- Classification of Microorganisms
- Experiment
- Nature of microorganisms
- Growth of microorganisms
- Bacteria
- Useful Role of Bacteria in Industry
- Useful Role of Bacteria in Food Industry
- Useful Role of Bacteria in Medicine
- Useful Role of Bacteria in Agriculture
- Fungi
- Economic Importance of Fungi
- Economic importance of fungi
- Beneficial activities
(a) Food
(b) Medicine
(c) Industries
(d) Production of Organic acid
(e) Bakery and Brewery
(f) Production of enzymes
(g) Agriculture - Harmful activities
- Economic Importance of Fungi
- Crop and Its Types
- Horticulture
- Organic Farming
- White Revolution
- Meat Providing Livestock
- Poultry Farm Management
- Poultry Farm Management
- Components of Poultry Farm Management
- Egg and Broiler Production
- Poultry Disease
- Aquaculture
- Fish culture
- Prawn Culture
- Pearl Culture
- Animal Husbandry (Livestock): Pisciculture (Fish Farming)
- Sericulture
- Introduction
- The Life Cycle of Silk Worm
- Animal Husbandry (Livestock): Apiculture (Bee Farming)
- Apiculture
- Types of Honey Bee
- Polymorphism in honey bee
- Artificial bee hive
