English Respiratory system Cited by user Cruithne9 on 04 Aug 2017 In most fish, and a number of other aquatic animals (both vertebrates and invertebrates) the respiratory system consists of gills, which are either partially or…
English Gas exchange Cited by user 82.28.217.183 on 15 Mar 2016 Gas exchange is the biological process by which gases move passively by diffusion across a surface.