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Hydra vulgaris : ウィキペディア英語版 | Hydra vulgaris
''Hydra vulgaris'', the fresh-water polyp,〔Paola Pierobon, Angela Tino, Rosario Minei, Giuseppe Marino. ''Different roles of GABA and glycine in the modulation of chemosensory responses in Hydra vulgaris (Cnidaria, Hydrozoa), Coelenterate Biology 2003''. Springer Netherlands. DOI: 10.1007/978-1-4020-2762-8_7.〕 is a small animal freshwater hydroid with length from 5mm to 15mm (0.2-0.6 inches).〔(Hydra ), Northern State University.〕 ==Description== The hydra have four to twelve tentacles that protrude from just outside the mouth. They feed by extending their tentacles and waiting for food to touch the tentacles. They then bring the food to their mouth, ingest and digest the organism. Anything that cannot be digested is egested. Ingestion and egestion occur through the mouth. Like other hydras, ''Hydra vulgaris'' cling to a base object with a "foot" pad, shaped like a disk. The ''Hydra'' moves by releasing its grip on its base and is carried away by the current. ''H. vulgaris'' can also move by bending over, grabbing a surface with its tentacles, releasing its grip with its "foot" and flipping over itself.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Hydra vulgaris」の詳細全文を読む
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