Webgill function in gas exchange and ion regulation is implicated in some of the most iconic events in animal history, including the stem vertebrate transition to larger,. Webfish have evolved different types of respiratory systems to obtain oxygen from water. Some of the common respiratory systems include gills, lungs, and labyrinth. Webfish and other aquatic organisms use gills to take up oxygen dissolved in the water and diffuse carbon dioxide out of the bloodstream. Some insects utilize a. Weban integration of the literature on gill and lung regeneration in vertebrates is presented using a comparative approach in order to outline the challenges that remain in. Webgills were present in the earliest fish, but lungs also evolved pretty early on, potentially from the tissue sac that surrounds the gills. Swim bladders evolved soon after. Websignificant differences were found in only two terrestrial species when considering posterior vs. Webthe difference in design between lungs and gills is the main reason why people can’t breathe underwater. Gills are much better than pulling oxygen from water. Webwe predicted that gas exchange and ion regulation would shift from the skin to the gills with increasing body size and challenges to oxygen supply and demand. Gas exchange at gills appears to. Webin 1962, underwater exploration pioneer jacques cousteau predicted the arrival of homo aquaticus: People surgically equipped with gills. “the lungs will be by.