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Use "gills" in a sentence
"Second, a good technique for gills is to cast the fly and and have it sit still for 10 seconds or at least until the rings caused by the fly landing on the water disappear."
"Oxygenated blood from the gills is fed to the muscles via large subsurface coetaneous arteries."
"In this circumstance of their possessing a one-celled heart, and colder and darker blood, they approach to the state of fish; which thus appear not to acquire so much oxygen by their gills from the water as terrestrial animals do by their lungs from the atmosphere; whence it may be concluded that the gills of fish do not decompose the water which passes through them, and which contains so much more oxygen than the air, but that they only procure a small quantity of oxygen from the air which is diffused in the water; which also is further confirmed by an experiment with the air-pump, as fish soon die when put in a glass of water into the exhausted receiver, which they would not do if their gills had power to decompose the water and obtain the oxygen from it."