What are the Complex filtering organs on vertebrates called?

The complex filtering organs in vertebrates are called gills. Gills are specialized structures that allow for the extraction of oxygen from water while simultaneously filtering out particulate matter. They consist of thin filaments and lamellae that increase the surface area for gas exchange, making them highly efficient for respiration in aquatic environments. In some vertebrates, like fish, gills also play a role in osmoregulation and waste elimination.