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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 B3.2: Transport 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 B3.2 Transport. 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.

B3.2.1 Adaptations of capillaries for exchange of materials

B3.2.2 Structure of arteries and veins

B3.2.3 Adaptations of arteries for the transport of blood away from the heart

B3.2.4 Measurement of pulse rates

B3.2.5 Adaptations of veins for the return of blood to the heart

B3.2.6 Causes and consequences of occlusion of the coronary arteries

B3.2.7 Transport of water from roots to leaves during transpiration

B3.2.8 Adaptations of xylem vessels for transport of water

B3.2.9 Distribution of tissues in a transverse section of the stem of a dicotyledonous plant

B3.2.10 Distribution of tissues in a transverse section of the root of a dicotyledonous plant

B3.2.11 Release and reuptake of tissue fluid in capillaries (HL)

B3.2.12 Exchange of substances between tissue fluid and cells in tissues (HL)

B3.2.13 Drainage of excess tissue fluid into lymph ducts (HL)

B3.2.14 Differences between circulation of bony fish and of mammals (HL)

B3.2.15 Adaptations of the mammalian heart for delivering pressurized blood to the arteries (HL)

B3.2.16 Stages in the cardiac cycle (HL)

B3.2.17 Generation of root pressure in xylem vessels by active transport of mineral ions (HL)

B3.2.18 Adaptations of phloem sieve tubes and companion cells for translocation of sap (HL)

IB Biology Topic B3.2: Transport 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 B3.2: Transport Lessons

Lessons for B3.2 Transport - IB

IB Biology Topic B3.2: Transport Lessons