Most jellyfish do not have specialized digestive, osmoregulatory, central nervous, respiratory, or circulatory systems.
Most jellyfish do not have specialized digestive, osmoregulatory, central nervous, respiratory, or circulatory systems.
Phylum Cnidaria (e.g. jellyfish, corals) have an open circulatory system. This means that their circulatory fluid, called coelomic fluid, bathes their internal organs directly in nutrients and oxygen. There is no distinction between blood and interstitial fluid in an open circulatory system.
A jellyfish does not have any circulatory vessels. They use diffusion as their means of circulation. They do not have a closed circulatory system.
squids have closed closed circulatory systems
Cockroaches do have circulatory systems, they are are open circulatory systems
Because box jellyfish, as with all other cnidarians, do not have blood, or a circulatory system, they can not be considered "cold-blooded." However, they are ectotherms whose body temperatures are equal to the temperature of the environment.
The circulatory system affects the other body systems because the circulatory system gives oxygen to the other system. Without the circulatory system the other systems would not work.
Jellyfish are, compared to mollusks, arthropods and vertebrates, very simple organisms. Jellyfish did not evolve a circulatory system, as they can perform gas exchange at their outer surfaces.
systems
open circulatory systems
All creatures have circulatory systems
Circulatory systems operates blood circulation