FREE LEARNING SERIES
Biology: how living things work
Begin with the cell, then connect plant processes, nutrition, respiration and transport.
4 lessons · Learn at your own pace
Begin the first lesson →
Learn, practise, explain
Try the exercise before reading its explanation. Answer the self-check questions in your own words, then compare your reasoning with the answers. Revisit any difficult section before moving on. No account or payment is needed.
- 01
Cells and the processes that keep life going
A living cell is a working system, not just a labelled circle. Connect each structure to a task, then explain why cells need boundaries, exchanges, energy and information.
Learning outcome: Link organelles with functions, distinguish diffusion from osmosis, and reason about cell size, specialisation and evidence from microscope drawings.
Open lesson → - 02
Photosynthesis and transport: how a plant supplies its cells
A tree gains material, captures energy and moves water without a heart. Follow carbon, water and sugars through the plant to understand how those jobs fit together.
Learning outcome: Distinguish matter inputs from energy input, explain stomatal trade-offs, and reason about water transport and net gas-exchange measurements.
Open lesson → - 03
Digestion and nutrition: from food to useful molecules
Food does not travel directly from the plate into a muscle. Follow physical breakdown, chemical digestion, absorption and transport, and see why these are related but different processes.
Learning outcome: Explain the work of the main digestive organs, connect enzyme action with surface area, and interpret simple composition data without turning it into a personal diet prescription.
Open lesson → - 04
Respiration and circulation: connecting air, blood and cells
Breathing moves air, blood moves materials, and cells transform chemical energy. Trace these connected processes without treating the lungs, heart or a pulse reading as the whole explanation.
Learning outcome: Explain ventilation, diffusion and double circulation, then distinguish the rate of moving air or blood from the rate at which tissues actually receive oxygen.
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