| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| upper and lower respiratory system structures | 1.69 | 0.7 | 9168 | 3 | 45 |
| upper | 1.12 | 0.1 | 7857 | 82 | 5 |
| and | 0.31 | 0.4 | 4024 | 1 | 3 |
| lower | 0.04 | 0.3 | 4271 | 79 | 5 |
| respiratory | 1.92 | 0.1 | 5950 | 52 | 11 |
| system | 0.7 | 0.7 | 9068 | 60 | 6 |
| structures | 1.89 | 0.2 | 5108 | 44 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| upper and lower respiratory system structures | 0.98 | 0.7 | 1748 | 88 |
| respiratory system upper and lower | 1.58 | 1 | 2963 | 85 |
| upper and lower tract of respiratory system | 0.44 | 0.6 | 3289 | 88 |
| lower respiratory system structures | 0.62 | 0.1 | 4127 | 60 |
| upper and lower respiratory systems | 0.57 | 0.2 | 2965 | 43 |
| structures of the upper respiratory system | 0.08 | 0.1 | 2523 | 98 |
| anatomy of upper and lower respiratory tract | 0.96 | 0.7 | 5006 | 59 |
| the upper respiratory structures | 1.26 | 0.2 | 8842 | 13 |
| the lower respiratory structures | 1.66 | 0.3 | 8294 | 82 |
| upper and lower respiratory tract parts | 0.96 | 0.8 | 3631 | 100 |
| anatomy of the upper respiratory system | 1.97 | 1 | 6088 | 68 |
