| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| blood vessels that contain valves | 1.81 | 0.7 | 2859 | 33 |
| blood vessels that contain valves are called | 0.9 | 0.7 | 8113 | 53 |
| which blood vessels contain valves | 1.99 | 1 | 199 | 36 |
| which blood vessels contain non-return valves | 1.69 | 0.5 | 2687 | 27 |
| what blood vessels contain valves | 0.07 | 0.4 | 4693 | 92 |
| which type of blood vessels contain valves | 1.16 | 1 | 8229 | 45 |
| what type of blood vessels contain valves | 0.18 | 0.3 | 8606 | 10 |
| the blood vessels contain numerous valves | 1.74 | 0.2 | 9037 | 1 |
| blood vessels contain valves | 1.57 | 0.7 | 8708 | 11 |
| the blood vessels that contain valves are the | 1.96 | 0.4 | 8315 | 55 |
