Question

Hydra is a water organizum it don't have organs to excreat how does it excreat ?​

Answer 1

Answer:

Hydra is a freshwater sessile organism belonging to the phylum Cnidaria and class Hydrozoa. They are found in lakes, pond, and stream. Hydra is ammonotelic i.e they secrete ammonia as chief excretory nitrogenous waste. In hydra specialized excretory organs are absent hence in hydra, wastes of food digestion and nitrogenous wastes are removed from mouth and body wall.

So, the correct answer is 'Mouth and body wall'.

Answer 2

The fluid is pumped through a wall in the body wall formed due to the tight contraction when the abdomen is disturbed by the fluid.

Normal hydra, therefore, should remove most of the liquid by synchronizing it and expelling it with its mouth.