length increases as a result. Likewise when the longitudinal muscles contract, the limb shortens and so the transverse muscle extends to increase the cross-sectional area.

Suckers

Cephalopod limbs bear numerous suckers along their ventral surface as in octopus, squid and cuttlefish arms and in clusters at the ends of the tentacles (if present), as in squid and cuttlefish. Each sucker

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