自割 (Autotomy)是一種動物求生的本能,其中的例子包括壁虎斷尾,螃蟹斷臂等等。601Please respect copyright.PENANAxsZvs1SZGs601Please respect copyright.PENANAJimayACfif
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過一段時間後,器官便會再生回復至原來的樣貌,其體積有機會比原來的更為細少。601Please respect copyright.PENANArToT4ONIP3
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(圖2)有科學家嘗試用尼龍蠅綁住海蛞蝓(Sea Slug)的頸部,發現牠們有能力進行自割,頭身分離。601Please respect copyright.PENANAobOQeVK3Ta601Please respect copyright.PENANAj13SgNiTgF
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有情況甚至是頭部與心臟、大腸、性器官等分離。而其脫離的頭部則吃著海藻維生。601Please respect copyright.PENANAgOAoOkqQYJ
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7日後,頭部發展出心臟等器官。約20日後,所有器官亦能順利發展成為原狀,又一條好漢。601Please respect copyright.PENANA7bX6SfTJkP
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至於被遺棄的身體,則隨著時間變得暗淡及萎縮,沒能長出頭部。601Please respect copyright.PENANAfZJMWixAc8
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(圖3)自然情況下,當海蛞蝓遭受到寄生蟲入侵時,進行自割並頭身分離的情況亦會發生。601Please respect copyright.PENANAbsgqP6Gb89601Please respect copyright.PENANARhQKlOboe6
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鑑於這情況的發生,有理由可相信海蛞蝓進行自割是天生用來對抗外敵入侵的手段。601Please respect copyright.PENANAMYSbb5gdLy
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此地不宜久留之時,若有逃生門手段可走,自然界的生物自當會不惜一切進行逃離。601Please respect copyright.PENANAcRNaOwbuhI
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Ref1:https://www.cell.com/current-biology/fulltext/S0960-9822(21)00047-6601Please respect copyright.PENANAKSTgqzpFT3