…The active movement of animals is directional, driven primarily by the need to find suitable places and food, and it is believed that the structures of the animal's body have developed and differentiated for this purpose. These include the establishment of an anterior-posterior axis, the efficient strengthening of forward locomotor power, and the concentration of feeding, sensory, and regulatory functions at the front end. This is called cephalization. However, the degree and nature of this process vary depending on the species and lifestyle. *Some of the terminology explanations that mention "cephalization" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…動物の積極的な移動は,好適な場所や食物の獲得を主要な動機として方向性をもって行われ,そのための動物体の構造が発達・分化したと考えられる。前後軸の確立と前進方向への運動力の効率的な強化,そして前端部への摂食・感覚および調整の機能の集中などがそれであり,これが頭部形成cephalization(頭化)といわれるものである。しかし,その程度・様相は種類や生活様式によってさまざまである。… ※「cephalization」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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