Components of blood have distinct roles in transport and defense.
Complete the table by giving the missing information.
| Component | Function |
|---|---|
| Transports digested food, heat energy, and urea | |
| Phagocytes | |
| Contain haemoglobin to bind and transport oxygen | |
| Lymphocytes |
Vaccination introduces an inactive form of a pathogen to stimulate the production of memory cells.
Explain how these memory cells protect an individual from developing disease symptoms if they are later exposed to the live pathogen.
55 exam-style questions on Edexcel IGCSE Biology Transport. Each one has a worked solution and a mark scheme showing where the marks go.