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Information about Ink Sac

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Ventral view of the viscera of Chtenopteryx sicula


An ink sac is an anatomical feature, an ink-containing organ of a cephalopod (octopuses, squids and cuttlefish). This sac can release an inky fluid from a duct opening at the base of the siphon in order to confuse its enemy or prey, or as cover to escape. A general level of provocation is necessary to trigger an octopus to release its ink, as it is biologically costly to produce. Some species can even use their ink to stun or numb their predators.
Zootomy is a contraction of zoological and anatomy. It refers to the dissection of animals as opposed to that of plants (phytotomy)

See also

  • Androtomy
  • Zootomical terms for location
  • Cat anatomy
  • Fish anatomy
  • Bird anatomy
  • Spider anatomy

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Cephalopoda
Cuvier, 1797

Orders

Subclass Nautiloidea
  • †Plectronocerida
  • †Ellesmerocerida
  • †Actinocerida
  • †Pseudorthocerida
  • †Endocerida
  • †Tarphycerida
  • †Oncocerida

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Octopoda
Leach, 1818

Suborders

†Pohlsepia (incertae sedis)
†Proteroctopus (incertae sedis)
†Palaeoctopus (incertae sedis)
Cirrina
Incirrina
Synonyms

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For other uses, see Squid (disambiguation).


Superconducting Quantum Interference Devices (SQUID) are very sensitive magnetometers used to measure extremely small magnetic fields, based on superconducting loops
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Sepiida
Zittel, 1895

Suborders and Families
  • †Vasseuriina
  • †Vasseuriidae
  • †Belosepiellidae
  • Sepiina

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The term siphon is used for a number of biological structures, either because flowing liquids are involved or because the object is shaped like a siphon. In these structures, the physical phenomenon known as the siphon effect is not present.
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Herod_Archelaus


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