The same is true for sea squirts. Yes, in fish the pharyngeal pouches go on to push through to the outside of the body, and the tissues between the 'slits' develop into the gill bars of bone or cartilage that support the delicate filaments of the gils themselves.
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Learn about recycling / Scrap metals. Metal recycling protects the environment, reduces energy consumption and helps ensure a steady supply of raw materials at home and abroad. The U.S. scrap recycling industry is recognized as one of the worldâs first âgreen industries.â. If you are interested in learning more about the scrap metals industry, or the process of how the metals are recycled, please see the following links and facts below.