An ink sac is an anatomical feature that is found in many cephalopod mollusks used to produce the defensive cephalopod ink. With the exception of nocturnal and very deep water cephalopods, all Coleoidea (squid, octopus and cuttlefish) which dwell in light conditions have an ink sac, which can be used to expel a cloud of dark ink in order to ...

2014年5月12日 · Cephalopod ink is composed of secretions from two glands. The ink sac with its ink gland produces a black ink containing melanin and a second organ, the funnel organ, a mucus-producing...

Almost all cephalopods have an ink sac, a bladder that can suddenly release a plume of dense, black ink. The ink is a mix of two secretions—a melanin-based chemical from the ink gland that gives it the dark hue and a thick mucus from the animal’s funnel organ.

2012年1月13日 · Cephalopods (again!) are experts at this confusion strategy, using not only chromatophores but also ink sacs. These ink sacs are a modification of part of the lower intestine; they empty near the siphon, so when the mollusk jet-propels itself to safety, the ink (if released) squirts out with the mantle cavity water.

Topics include: (1) the production of ink, including the functional organization of the ink sac and funnel organ that produce it; (2) the chemical components of ink, with a focus on the best known of these-melanin and the biochemical pathways involved in its production; (3) the neuroecology of the use of ink in predator-prey interactions by ...

…deep-sea Octopoda there is an ink sac located near the anus. This secretes a dark fluid, the sepia or ink, which is forcibly ejected through the funnel. Sepia is obtained from the ink sacs of these invertebrates. The sacs are speedily extracted from the …

One of the most distinctive and defining features of coleoid cephalopods—squid, cuttlefish and octopus—is their inking behavior. Their ink, which is blackened by melanin, but also contains other constituents, has been used by humans in various ways for millennia. This review summarizes our current knowledge of cephalopod ink.

Ink extracted from fossilized ink sacs of a Jurassic cephalopod, Belemnotheutis antiquus, was found to contain eumelanin with a chemical composition and structure highly similar to that of Sepia officinalis [73].

The ink is extracted from the ink sacs during preparation of the dead cephalopod, usually cuttlefish, and therefore contains no mucus. While it is not commonly used in China, cephalopod ink is sometimes used to dye the dough of dumplings.

2014年5月12日 · Topics include: (1) the production of ink, including the functional organization of the ink sac and funnel organ that produce it; (2) the chemical components of ink, with a focus on the best known of these-melanin and the biochemical pathways involved in its production; (3) the neuroecology of the use of ink in predator-prey interactions by ...