Question

Explain body wall of hydra

Answer 1

Hydra has two main body layers, which makes it "diploblastic". The layers are separated by mesoglea, a gel-like substance. The outer layer is the epidermis, and the inner layer is called the gastrodermis, because it lines the stomach.
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Answer 2

hey friend !!!!

Hydra has two main body layers, which makes it "diploblastic".

Nerve nets connect sensory photoreceptors and touch-sensitive nerve cells located in the body wall and tentacles.

Respiration and excretion occur by diffusion everywhere through the epidermis.