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  2. Cephalopod limb - Wikipedia

    en.wikipedia.org/wiki/Cephalopod_limb

    Arms and buccal mass of the squid Taningia danae.As in other Octopoteuthidae, the tentacles are absent in adults. Oral view of the bobtail squid Semirossia tenera Head and limbs of the bobtail squid Rossia glaucopis Oral view of male Bathypolypus arcticus with hectocotylus on arm III (left) Cephalopod suckers and configuration of suckers on tentacular club Serrated suckers of a giant squid ...

  3. Cephalopod - Wikipedia

    en.wikipedia.org/wiki/Cephalopod

    In addition, tunics take up only 1% of the squid mantle's wall thickness, whereas the longitudinal muscle fibers take up to 20% of the mantle wall thickness in octopuses. [81] Also because of the rigidity of the tunic, the radial muscles in squid can contract more forcefully. The mantle is not the only place where squids have collagen.

  4. Scar free healing - Wikipedia

    en.wikipedia.org/wiki/Scar_free_healing

    Unlike the limited regeneration seen in adult humans, many animal groups possess an ability to completely regenerate damaged tissue. [4] Full limb regeneration is seen both in invertebrates (e.g. starfish and flatworms which can regenerate fully functioning appendages) and some vertebrates, however in the latter this is almost always confined to the immature members of the species: an example ...

  5. Marine invertebrates - Wikipedia

    en.wikipedia.org/wiki/Marine_invertebrates

    Most echinoderms are able to regenerate tissue, organs, limbs, and reproduce asexually; in some cases, they can undergo complete regeneration from a single limb. Geologically, the value of echinoderms is in their ossified skeletons , which are major contributors to many limestone formations, and can provide valuable clues as to the geological ...

  6. Hox genes in amphibians and reptiles - Wikipedia

    en.wikipedia.org/wiki/Hox_genes_in_amphibians...

    Hox genes play a massive role in some amphibians and reptiles in their ability to regenerate lost limbs, especially HoxA and HoxD genes. [1]If the processes involved in forming new tissue can be reverse-engineered into humans, it may be possible to heal injuries of the spinal cord or brain, repair damaged organs and reduce scarring and fibrosis after surgery.

  7. Ecdysis - Wikipedia

    en.wikipedia.org/wiki/Ecdysis

    The maturation of the structure and colouration of the new exoskeleton might take days or weeks in a long-lived insect; this can make it difficult to identify an individual if it has recently undergone ecdysis. Ecdysis allows damaged tissue and missing limbs to be regenerated or substantially re-formed. Complete regeneration may require a ...

  8. Sepioloidea lineolata - Wikipedia

    en.wikipedia.org/wiki/Sepioloidea_lineolata

    Throughout the day, the squid continues to flick sand particles over its body in order to remain hidden. Because the striped pyjama squid is almost always buried, its pupil is placed dorsally on its body. This also means that Sepioloidea lineolata have high density photoreceptors due to the increased eye movements. [13]

  9. Vampire squid - Wikipedia

    en.wikipedia.org/wiki/Vampire_squid

    The vampire squid (Vampyroteuthis infernalis, lit. 'vampire squid from hell') is a small cephalopod found throughout temperate and tropical oceans in extreme deep sea conditions. [ 2 ] [ 3 ] The vampire squid uses its bioluminescent organs and its unique oxygen metabolism to thrive in the parts of the ocean with the lowest concentrations of oxygen.