https://wiki.tiffa.net/w/index.php?action=history&feed=atom&title=Translations%3AFish%2F50%2FenTranslations:Fish/50/en - Revision history2026-07-04T09:08:45ZRevision history for this page on the wikiMediaWiki 1.43.0https://wiki.tiffa.net/w/index.php?title=Translations:Fish/50/en&diff=168309&oldid=prevFuzzyBot: Importing a new version from external source2025-08-28T03:54:57Z<p>Importing a new version from external source</p>
<p><b>New page</b></p><div>Fish exchange gases using [[gill]]s on either side of the [[pharynx]]. Gills consist of comblike structures called filaments. Each filament contains a [[capillary]] network that provides a large [[surface area]] for exchanging [[oxygen]] and [[carbon dioxide]]. Fish exchange gases by pulling oxygen-rich water through their mouths and pumping it over their gills. Capillary blood in the gills flows in the opposite direction to the water, resulting in efficient [[countercurrent exchange]]. The gills push the oxygen-poor water out through openings in the sides of the pharynx. Cartilaginous fish have multiple gill openings: sharks usually have five, sometimes six or seven pairs; they often have to swim to oxygenate their gills. Bony fish have a single gill opening on each side, hidden beneath a protective bony cover or [[operculum (fish)|operculum]]. They are able to oxygenate their gills using muscles in the head.</div>FuzzyBot