Fish gill structure
<a href="https://uk.wikipedia.org/wiki/%D0%9A%D0%BE%D1%80%D0%B8%D1%81%D1%82%D1%83%D0%B2%D0%B0%D1%87:Shao" class="extiw" title="uk:Користувач:Shao">Користувач:Shao</a> \ Anaxibia
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<a rel="nofollow" class="external autonumber" href="https://www.kuensting.org/school/bb/systems/gas_exchange.htm">[1]</a>, as extracted from <a class="external text" href="https://en.wikipedia.org/wiki/File:FishGills2.jpg">this Commons file</a>