Cosmoid scale
In this article, the topic of Cosmoid scale will be addressed, which has aroused great interest in different areas. Cosmoid scale is a topic that has generated debate and discussion in today's society, and its relevance has been increasing in recent years. Through this article, we aim to analyze different aspects related to Cosmoid scale, providing a comprehensive view on this topic. From its origins to its impact today, different perspectives and opinions will be explored to fully understand the importance of Cosmoid scale today.
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Cosmoid scales contain cosmine in large amount.So the scales are called cosmoid scales.these scales have 4 layers-(a)the outermost layer contains enamel.This is called Ganoin layer. (b)hard cosmine layer. (c)spongy layer. (d)the innermost layer-compact layer.This scale is not found in any living fish.But fossil like lobe-fin fish,lung fish,Placodermi,Ostracodermi had cosmoid scales.