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ink sac |
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ink sac [′iŋk ‚sak] (invertebrate zoology) An organ attached to the rectum in many cephalopods which secretes and ejects an inky fluid. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Inside cells around the organ--as well as in the skin, in the ink sac, and around the eyes--are reflective, iridescent structures that resemble stacks of coins. When threatened, the squid squirts a mixture of dark ink and mucus from its ink sac out through its funnel. Taking the quill-like inner skeleton, King had the pupils dip the end into the squid's ink sac and write their names on the diagrams they used as guides. |
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