Gills work by continually “filtering” water as is flows through them. Lungs are filled and then emptied according to some pattern of breath. The difference in

Gills work by continually “filtering” water as is flows through them. Lungs are filled and then emptied according to some pattern of breath. The difference in volume of fluid processed must be significant. Also, can’t gills have a higher surface area to volume ratio than lungs?