ink sac


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ink sac

a sac that opens into the rectum of some CEPHALOPODS, that when stimulated releases dark brown fluid that acts as a ‘smoke screen’.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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Squid today use a similar ink sac to shoot out black fluid that blinds predators.
Slit open the head and remove the guts, carefully avoiding puncturing the ink sac. Grasp the body firmly, and with a finger push the beak up through the center of the tentacles.
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.
Find the silvery ink sac (it looks like a small silver bag) and cut it open, so the ink comes out.
An old pen with unresilient ink sac may make many scratches before
(When you separate section from barrel, expect hardened chips of old ink sac to fall out.
The colour, sepia, is named after the pigment from the ink sac of which marine creature?
The functional symbiotic organ is composed of several host tissues, including a core of branching epithelial crypts that houses the symbionts; a thick reflector that directs the bacterial luminescence ventrally; diverticula of the ink sac that dynamically control the intensity of
When threatened, the squid squirts a mixture of dark ink and mucus from its ink sac out through its funnel.
Cut off and discard portion with eyes and ink sac. Rinse tentacles.
For instance, if a pen has a lever fill but has not been used for a long time, the ink sac will undoubtedly have solidified and need replacing.