close circulatory system
Two key points are a closed circulation with a high pressure arterial and a lower pressure venous system and a chambered heart. Mollusks have a single chambered heart and an open (no venous system) circulation.
All vertebrates have a closed circulatory system. The number of chambers in the heart is the main variable.
closed circulatory system.
A double circulatory system as blood passes through the heart twice for every circuit.
I have no idea. im still trying to figure that out. Ugh
Open circulatory system.
Humans have closed 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.
They are in the animal kingdom, phylum arthropoda, class insecta :)
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.
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
Closed circulatory system I believe.
They have a closed circulatory system.