In this article we will discuss about the structure of hydra. This will also help you to draw the structure and diagram of hydra.

Hydra

1. It is a fresh water form cosmopolitan in distribution.

2. It is found attached to aquatic weeds.

3. Body differentiated into a long tubular trunk and a hypostome or mouth surrounded by a ring of long tentacles.

4. Through the body runs a cavity- the coelenteron which also extends into tentacles.

5. Body-wall diploblastic and is made up of outer ectoderm and inner endoderm and a gelatinous mesogloea in between the two layers.

6. The outermost covering of ectoderm is in the form of transparent cuticle.

7. The specialised organs of offence and defence -the nematocysts are present.

8. Along the body, ‘at places’, are found small buds, which are future young ones.

9. Reproduces asexually as well as sexually.

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