The circulatory system in mammals is specialized for the efficient transport of substances around the body.
Complete the table below by providing the missing information for (i), (ii), (iii), (iv), and (v).
| Vessel / Component | Structural Feature / Function |
|---|---|
| Arteries | (i) |
| (ii) | Contain valves to maintain unidirectional blood flow |
| Capillaries | (iii) |
| (iv) | Stretch and recoil to smooth blood flow and maintain pressure |
| Veins | (v) |
Describe the structural differences between arteries and veins that help them carry out their respective functions.
55 exam-style questions on Edexcel IGCSE Biology Transport. Each one has a worked solution and a mark scheme showing where the marks go.