| Rating | Solver | Clue |
|---|---|---|
| SLUNG | Breathing organs | |
| LUNGS | Breathing organs | |
| GILLS | Shark breathing organs | |
| PULMONATE | Having breathing organs that act as lungs. | |
| LUNGED | Having lungs, or breathing organs similar to lungs. | |
| STOMA | The minute breathing pores of leaves or other organs opening into the intercellular spaces, and usually bordered by two contractile cells. | |
| TRACHEOBRANCHIA | One of the gill-like breathing organs of certain aquatic insect larvae. They contain tracheal tubes somewhat similar to those of other insects. | |
| OPISTHOBRANCHIATA | A division of gastropod Mollusca, in which the breathing organs are usually situated behind the heart. It includes the tectibranchs and nudibranchs. | |