The Digestive Apparatus of a Hydra or Freshwater Polyp

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In Radiata the digestive cavity is a pouch with a single opening, into which the food is passed and from which the residuum is ejected, as in the Hydra.

Keywords

hydra, polyp, digestion, radiata

Galleries

Corals and Sea Anemone

Source

Cutter, Calvin First Book on Analytic Anatomy, Physiology and Hygiene, Human and Comparative (Philadelphia: J. B. Lippincott & Co., 1875) 72

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