Loading subject…

A1.1 Water

A1.2 Nucleic acids

A2.1 Origins of cells (HL)

A2.2 Cell structure

A2.3 Viruses (HL)

A3.1 Diversity of organisms

A3.2 Classification and cladistics (HL)

A4.1 Evolution and speciation

A4.2 Conservation of biodiversity

B1.1 Carbohydrates and lipids

B1.2 Proteins

B2.1 Membranes and membrane transport

B2.2 Organelles and compartmentalization

B2.3 Cell specialization

B3.1 Gas exchange

B3.2 Transport

B3.3 Muscle and motility (HL)

B4.1 Adaptation to environment

B4.2 Ecological niches

C1.1 Enzymes and metabolism

C1.2 Cell respiration

C1.3 Photosynthesis

C2.1 Chemical signalling (HL)

C2.2 Neural signalling

C3.1 Integration of body systems

C3.2 Defense against disease

C4.1 Populations and communities

C4.2 Transfer of energy and matter

D1.1 DNA replication

D1.2 Protein synthesis

D1.3 Mutations and gene editing

D2.1 Cell and nuclear division

D2.2 Gene expression (HL)

D2.3 Water potential

D3.1 Reproduction

D3.2 Inheritance

D3.3 Homeostasis

D4.1 Natural selection

D4.2 Sustainability and change

D4.3 Climate change

IB Biology Topic C3.1: Integration of Body Systems Lessons

Written by IB Experts

This lesson delivers structured, step-by-step lessons that guide students through every part of the IB Biology syllabus for C3.1 Integration of body systems. These lessons simplify complex ideas like molecular biology, evolutionary mechanisms, and homeostasis, while worked examples show how to approach IB-style questions.

Designed for both HL and SL learners, RevisionDojo lessons ensure students not only understand the theory but also know how to apply it in IB Paper exam situations.

With clear explanations, active learning checks, and a syllabus-first design, RevisionDojo makes revision less overwhelming and more effective.

C3.1.1 System integration

C3.1.2 Cells, tissues, organs and body systems

C3.1.3 Integration of organs in animal bodies

C3.1.4 The brain as a central information integration organ

C3.1.5 The spinal cord as an integrating centre for unconscious processes

C3.1.6 Input to the spinal cord and cerebral hemispheres through sensory neurons

C3.1.7 Output from the cerebral hemispheres to muscles through motor neurons

C3.1.8 Nerves as bundles of nerve fibres of both sensory and motor neurons

C3.1.9 Pain reflex arcs

C3.1.10 Role of the cerebellum in coordinating skeletal muscle contraction and balance

C3.1.11 Modulation of sleep patterns by melatonin secretion as a part of circadian rhythms

C3.1.12 Epinephrine (adrenaline) secretion by the adrenal glands

C3.1.13 Control of the endocrine system

C3.1.14 Feedback control of heart rate

C3.1.15 Feedback control of ventilation rate

C3.1.16 Control of peristalsis in the digestive system

C3.1.17 Observations of tropic responses in seedlings (HL)

C3.1.18 Positive phototropism (HL)

C3.1.19 Phytohormones (HL)

C3.1.20 Auxin efflux carriers (HL)

C3.1.21 Promotion of cell growth by auxin (HL)

C3.1.22 Interactions between auxin and cytokinin (HL)

C3.1.23 Positive feedback in fruit ripening and ethylene production (HL)

Written by IB Experts

This lesson delivers structured, step-by-step lessons that guide students through every part of the IB Biology syllabus for C3.1 Integration of body systems. These lessons simplify complex ideas like molecular biology, evolutionary mechanisms, and homeostasis, while worked examples show how to approach IB-style questions.

Designed for both HL and SL learners, RevisionDojo lessons ensure students not only understand the theory but also know how to apply it in IB Paper exam situations.

With clear explanations, active learning checks, and a syllabus-first design, RevisionDojo makes revision less overwhelming and more effective.

C3.1.1 System integration

C3.1.2 Cells, tissues, organs and body systems

C3.1.3 Integration of organs in animal bodies

C3.1.4 The brain as a central information integration organ

C3.1.5 The spinal cord as an integrating centre for unconscious processes

C3.1.6 Input to the spinal cord and cerebral hemispheres through sensory neurons

C3.1.7 Output from the cerebral hemispheres to muscles through motor neurons

C3.1.8 Nerves as bundles of nerve fibres of both sensory and motor neurons

C3.1.9 Pain reflex arcs

C3.1.10 Role of the cerebellum in coordinating skeletal muscle contraction and balance

C3.1.11 Modulation of sleep patterns by melatonin secretion as a part of circadian rhythms

C3.1.12 Epinephrine (adrenaline) secretion by the adrenal glands

C3.1.13 Control of the endocrine system

C3.1.14 Feedback control of heart rate

C3.1.15 Feedback control of ventilation rate

C3.1.16 Control of peristalsis in the digestive system

C3.1.17 Observations of tropic responses in seedlings (HL)

C3.1.18 Positive phototropism (HL)

C3.1.19 Phytohormones (HL)

C3.1.20 Auxin efflux carriers (HL)

C3.1.21 Promotion of cell growth by auxin (HL)

C3.1.22 Interactions between auxin and cytokinin (HL)

C3.1.23 Positive feedback in fruit ripening and ethylene production (HL)

IB Biology Topic C3.1: Integration of Body Systems Lessons

A - Unity and Diversity

B - Form and Function

C - Interaction and Interdependence

D - Continuity and Change

A - Unity and Diversity

B - Form and Function

C - Interaction and Interdependence

D - Continuity and Change

IB Biology Topic C3.1: Integration of Body Systems Lessons

Lessons for C3.1 Integration of body systems - IB

Lessons for C3.1 Integration of body systems - IB

IB Biology Topic C3.1: Integration of Body Systems Lessons