GCSE A level Biology Fish Gills and Gas Exchange Fish Head Dissection

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In this video, Head of Biology Mr May carries out a fish head dissection and explains how the gills of a fish are adapted for efficient gas exchange. Also covered by the video includes how the fish draws water into its mouth and over its gills. The structure of the gills (filaments, lamellae) as well as the counter current mechanism in fish for maintaining a large concentration gradient. #gcsebiology #gcsefishgills #biologydissection #Alevelbiology • Timestamps: • 0:00 - introduction • 0:20 - Ram Ventilation • 0:55 - Drawing Water Through The Gills • 1:55 - Gill Structure • 2:39 - Counter Current Mechanism • 3:41 - Gills Underwater • Exam Questions: • A-level Biology - Gas Exchange Questions - shorturl.at/bLYZ4 Mark Scheme - shorturl.at/otyLW

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