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The circulatory system of the Coral, all of these animals include jellyfish, hydras and sea anemones that are known as coelenterates. A coelenterate has a gastrovascular system, meaning that the digestive and circulatory system are meshed in the coelenterates body. This circulatory system means that they live off of each other without one harming the other animals. nique cell type, the cnidocyte, which helps to gather food. the food collected is taken into the central gastrovascular cavity where extracellular digestion takes place and then intracellular digestion. The branches of the gastrovascular cavity allow the materials, nutrients, and food to travel ot all parts of the coral.