Exchange and Transport¶
Module 3 applies cell and membrane knowledge to whole-organism systems. It is framed around the consequences of increasing size and metabolic demand.
Core Role¶
- Explain why multicellular organisms need specialised exchange and transport systems.
- Compare exchange and transport in mammals, fish, insects and plants.
- Tie structure directly to movement of gases, water, solutes and assimilates.
Topic Guide¶
Each Module 3 topic page now opens with a learner-facing What You Need to Learn section. Use these links to move from the transport problem to the structures and mechanisms that solve it.
| Topic | Main focus |
|---|---|
| 3.1.1 Exchange surfaces | exchange-surface principles; mammalian ventilation; fish and insect gas exchange |
| 3.1.2 Transport in animals | circulatory systems; blood and vessels; haemoglobin; the heart |
| 3.1.3 Transport in plants | xylem and phloem; transpiration; xerophyte adaptations; translocation |