First slide

Classification of Animals

Question

In Hydra, the extracellular digestion takes place in

Easy

A

paragastric cavity
B

coelenteron
C

mesoglea
D

terminal opening of hypostome

Solution

In Hydra, the extracellular digestion takes place in coelenteron or gastro-vascular cavity. Intracellular digestion takes place in the nutritive-muscular cells of the gastrodermis.
Para–gastric cavity is present in sponges.

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