The sponge has no nervous system, digestive system, or circulatory system. Instead, most people rely on maintaining a constant flow of water through their bodies to get food and oxygen and get rid of waste products.
Does the sponge phylum have a circulatory system?
In summary, sponges (or sponges) do not have a true circulatory system like most animals. There are no hearts, veins, arteries, and no blood on the sponge. However, they achieve gas exchange and nutrient consumption through the movement of water.
Why does the sponge have no circulatory system?
The simplest animals, such as sponges (Porifera) and rotifera (Rotifera), require a circulatory system because diffusion allows for the proper exchange of water, nutrients, waste, and dissolved gas. plug. .. Instead, gas, nutrients and waste are exchanged by diffusion.
What are the main features of Polyfera Sponge?
Characteristics of the sponge phylum They are generally marine aquatic organisms and there are several freshwater species. Their bodies are asymmetric. The body shape can be cylindrical, vase-like, round, or sac-like. They are ectoderm animals with two layers, the outer dermis and the inner gastric layer.
Which features are not found in sponges?
The sponge does not have a clear circulatory system, respiratory system, digestive system, or excretory system. Instead, the water flow system supports all these features.
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