The simplest animals, such as sponges (Porifera) and rotifera (Rotifera), do not require a circulatory system because diffusion allows for the proper exchange of water, nutrients, waste, and dissolved gas. instead, gas, nutrients and waste are exchanged by diffusion.
Is the circulatory system open or closed in the sponge?
Polyferan is an aquatic animal, also known as a sponge. The sponge does not have a true circulatory system, but a simple stream of water achieves the goal of exchanging nutrients and gas.
What is the circulatory system of the sponge?
The sponge has no nervous system, digestive system, or circulatory system. They rely on maintaining a constant flow of water through their bodies to get food and oxygen and get rid of waste products. Sponges have a unique feeding system among animals.
What are the organisms that do not have a circulatory system?
Cardiovascular-free animals: (a) cardiovascular system for simple animals consisting of a single cell layer such as a sponge or (b) a small number of cell layers such as jellyfish. there is not. Instead, gas, nutrients and waste are exchanged by diffusion.
What kind of system does the sponge have?
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.
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