close circulatory system
They are in the animal kingdom, phylum arthropoda, class insecta :)
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.
Butterflies belong to the Phyla or Phylum Arthropoda.
open circulatory system is the type of circulatory system in which blood vessels have direct contact with body tissues.the whole blood from body goes to heart and then passed in blood vessels which have direct contact with open spaces called sinuses after exchange of materials the blood goes back to heart. almost all invertebrates have open circulatory system such as Arthropoda.
Arthropoda is the scientific name. It is the name of the Phylum Arthropoda, the phylum of arthropods and includes insects, arachnids, crustaceans, sea spiders, centipedes and millipedes.
An open circulatory system.
A closed circulatory system
closed circulatory system
They have a closed circulatory system.
Closed Circulatory system
Type your answer here... They are suckers
earthworms have a closed circulatory system