Multicellular organisms rely on specialized transport systems to move substances around their bodies. In humans, this system is driven by the circulatory system and blood.
The table below lists some components of blood. Complete the table by providing the missing function or cell type/description for each component.
| Component of blood | Function | Cell type / description |
|---|---|---|
| phagocyte | (i) | (ii) |
| plasma | (iii) | liquid (non-cellular) |
| platelet | helps blood clot / clotting | (iv) |
Suggest the consequences to the body of having an abnormally low concentration of platelets in the blood.
Explain how phagocytes detect, engulf, and destroy a pathogen that has entered the bloodstream.
55 exam-style questions on Edexcel IGCSE Biology Transport. Each one has a worked solution and a mark scheme showing where the marks go.