"How do humans get lungs? Same reason. Fish have gills so they can breath in the water. Us humans have lungs and noses so we can breath in the air."@en . "How did fishes get gills"@en . . . . "How do humans get lungs? Same reason. Fish have gills so they can breath in the water. Us humans have lungs and noses so we can breath in the air."@en .