| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| history of blood circulation | 0.56 | 1 | 1991 | 28 | 28 |
| history | 1.8 | 0.8 | 9273 | 38 | 7 |
| of | 1.16 | 0.1 | 7712 | 55 | 2 |
| blood | 0.27 | 0.9 | 3647 | 66 | 5 |
| circulation | 0.7 | 0.1 | 2582 | 1 | 11 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| history of blood circulation | 1.89 | 1 | 4332 | 78 |
| who invented the circulation of blood | 1.35 | 0.6 | 1197 | 100 |
| when was the circulation of blood discovered | 1.22 | 1 | 4553 | 85 |
| who found blood circulation | 0.78 | 1 | 4848 | 7 |
| discovered circulation of blood | 1.44 | 0.9 | 8083 | 26 |
| who described the circulation of blood | 1.71 | 0.8 | 6631 | 98 |
| discovery of the circulation of blood | 1.14 | 0.3 | 1320 | 2 |
| who discover the circulation of blood | 1.66 | 0.5 | 3761 | 46 |
| who discovered blood circulation | 1 | 0.8 | 7636 | 67 |
| who discovered the circulation of human blood | 1.37 | 0.9 | 8493 | 67 |
| evolution of blood circulation | 1.31 | 0.7 | 1242 | 63 |
| circulation of blood inventor | 0.58 | 0.1 | 4383 | 51 |
| overview of blood circulation | 0.91 | 0.6 | 6178 | 80 |
| history of the circulatory system | 0.12 | 0.8 | 7174 | 23 |
