Cnidaria Phylum
Animals in the Cnidaria Phylum similar to the Porifera Phylum carry out circulation throughout the body through the process of diffusion. The circulatory system serves to move blood to a site or sites where it can be oxygenated, and where wastes can be disposed. Circulation then serves to bring newly oxygenated blood to the tissues of the body. As oxygen and other chemicals diffuse out of the blood cells and into the fluid surrounding the cells of the body's tissues, waste produces diffuse into the blood cells to be carried away. Blood circulates through organs such as the liver and kidneys where wastes are removed, and back to the lungs for a fresh dose of oxygen. And then the process repeats itself.
Sea Anemones and Coral do not have a true circulatory system. Their stomachs serve as their "circulatory system" because it’s a gastrovascular system, which is the digestive-excretory system lacking pouches and canals. . They also are given better circulation through the many species of fish that live symbiotically with the coral and sea anemone.For Example, the clownfish, is protected provides a home for the clownfish. At the same time, as the clownfish swims it provides a current to allow more circulation in and out of the sea anemone.
Sea Anemones and Coral do not have a true circulatory system. Their stomachs serve as their "circulatory system" because it’s a gastrovascular system, which is the digestive-excretory system lacking pouches and canals. . They also are given better circulation through the many species of fish that live symbiotically with the coral and sea anemone.For Example, the clownfish, is protected provides a home for the clownfish. At the same time, as the clownfish swims it provides a current to allow more circulation in and out of the sea anemone.