What are the features of the external structure of the hydra?
| June 21, 2021 | education
The body of the hydra is translucent, almost cylindrical, about 9 mm in size. On the upper part there is a mouth opening surrounded by a halo of tentacles, which can be significantly extended. Hydra is characterized by radial, that is, radial symmetry. Due to this, it can detect prey from any side and grab it with its tentacles. At the lower end of the body is the sole, which serves to attach the body to the substrate.
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