This “countercurrent exchange” mechanism maintains a constant concentration gradient of oxygen along the whole length with the gill, allowing for fish to extract nearly 90% of your oxygen within the h2o. This very successful system is very important supplied drinking water’s substantial viscosity and low oxygen articles. Even though these https://ventilationductwork23455.wizzardsblog.com/37421198/how-ventilation-ductwork-can-save-you-time-stress-and-money