Chemistry & Biology : How Do Squids Make Ink?

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Squids are cephalopods, and they have an ink sack that contains melanin, which can be shot out through a propulsion system. Learn about the mucus membrane that surrounds a squid's ink sack withhelp from a science teacher and field biologist in this free video on biology. Expert: Brian Erickson Contact: Bio: Brian Erickson is a tutor in math and science, as well as a field biologist. Filmmaker: Todd Green


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