What you'll learn
How substances move and how larger organisms transport them.
Transport
- Diffusion, osmosis and active transport.
- Surface-area-to-volume ratio and why big organisms need transport systems.
Cells and transport systems
- Mitosis for growth and repair.
- Blood and vessels (arteries, veins, capillaries); xylem and phloem in plants; transpiration.
Exam tips
- Compare diffusion, osmosis and active transport (energy? what moves?).
- Link adaptations (thin walls, large surface area) to their function.
Common mistakes
- Saying osmosis moves solutes (it moves water).
- Forgetting active transport needs energy.