As shown in Figure 1a, the simplest animals such as sponges (Porifera) and rotifers (Rotifera) are circulatory systems because diffusion allows for the proper exchange of water, nutrients, waste, and dissolved gas. Does not need. .. instead, gas, nutrients and waste are exchanged by diffusion.
How can a sponge survive without a cardiovascular system?
The sponge breathes by diffusion The sponge does not have the complex digestive, circulatory, and respiratory systems to move nutrients and oxygen around the body. Rather, each cell is independent and uses diffusion to carry out its own oxygen, food and waste processes. 2021
How does a sponge work without organs?
Since the sponge has no organ system, it has no respiratory or circulatory system. They diffuse from the water flowing through the body to get oxygen and then diffuse into the same puddle to expel waste products.
Can sponges survive without oxygen?
The sponge is the first animal to evolve on Earth and does not require much oxygen to survive. .. The sponge has no guts. Instead, they eat by filtering water through their bodies and removing organic matter from the water column.
How does the sponge circulate?
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. .. The cells on the wall of the sponge filter food from the water as it is pumped through the body and the forehead (the "small mouth").
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