Worksheet (PDF) to review the structure of the gills. Analyse counter-current flow using graphical data. Link the mechanism with exchange in the gill over the lamellae. Sample answers provided.
Label the gills with increasing detail.
Graph data based on oxygen concentration in water and lamellae.
Draw a sketch graph on parallel flow.
Extension:
Link graph to lamellae structure.
Worksheet could be used in conjunction with fish head dissection.
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