Question

the excretory opening of porifera

Answer 1

The organisms that appear to be plants under the sea are actually animals.

These animals, which are like a branch of tree and are attached to the ropes, are called porifera.

The excretory opening of porifera is known as sponges.

The sponges absorb oxygen, carbon dioxide and ammonia from the water through diffusion.

The mineral particles that can result in blockage are thrown out into the water.

Answer 2

The excretory opening of Porifera is osculum.  

Explanation:  

• The osculum is present in the Porifera’s excretory opening, and these help in absorbing ammonia, carbon dioxide, and water through the process of diffusion.
• When mineral particles get stuck in this process as they are too big to pass on through the opening, they are left behind in the water.
• The excretory system of the Porifera is dependent on a water flow system.