...they come in a wide variety of colors, including white, yellow, red, green, and black. Their basic body shape is pot-shaped, with a large cavity in the center called the gastric cavity and an opening (water outlet) at the top. There are countless small holes (water inlets) in the body wall, and channels connect the gastric cavity to the holes, allowing water to enter the cavity from the outside world. *Some of the terms that refer to "gastral cavity" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…色も白色,黄色,赤色,緑色,黒色と多種多様である。基本的な体型は壺状で,中央に胃腔gastral cavityという大きい空所があって,上端に口(出水孔)が開いている。体壁には無数の小さい穴(入水孔)が開いていて胃腔との間を溝道(みぞ)が連絡し,外界から胃腔内への水の通路になっている。… ※「gastral cavity」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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