| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| external respiration definition | 0.99 | 1 | 5248 | 48 | 31 |
| external | 1.16 | 0.9 | 881 | 93 | 8 |
| respiration | 0.65 | 0.2 | 2974 | 2 | 11 |
| definition | 0.43 | 0.2 | 9779 | 19 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| external respiration definition | 0.52 | 0.6 | 8447 | 3 |
