The Table shows some features of three types of blood vessel, X, Y and Z.
Table
| Blood vessel | Wall | Valves present | Lumen |
|---|---|---|---|
| X | thick, with muscle and elastic tissue | no | narrow |
| Y | thin, with a little muscle | yes | wide |
| Z | one cell thick | no | very narrow |
Identify which blood vessel, X, Y or Z, is a vein.
Explain why blood vessel X has a thick wall containing muscle and elastic tissue.
Explain why blood vessel Y has valves.
Explain how the wall of blood vessel Z is adapted for its function.
42 exam-style questions on Edexcel GCSE Biology 8.2 Blood and circulation, covering 8.2.1 Structure and function of the blood, 8.2.2 Structure of blood vessels, 8.2.3 Structure of the heart and circulatory system, and 8.2.4 Cardiac output. Each one has a worked solution and a mark scheme showing where the marks go.