Not clear on which 3 classes are the "major ones", but Polyplacophorans, Gastropods, and Bivalves have an open circulatory system while Cephalopods have a closed circulatory system.
Most mollusks have a closed circulatory system. However, cephalopods have an open circulatory system.
They have an open-circulatory system. They do not have ventricles to carry through blood. Most mollusks have an open-circulatory system.
the 3 fish classes
No. All vertebrates have a closed circulatory system. Arthropods and molluskshave an open circulatory system.
They don't have any circulatory system; fluids are dispersed into the pseudocoelom.
Mollusks which have an open circulatory system, have blood that is pumped into sinuses containing tissue.
Most mollusks have a closed circulatory system. However, cephalopods have an open circulatory system.
They have an open-circulatory system. They do not have ventricles to carry through blood. Most mollusks have an open-circulatory system.
Most mollusks have an open circulatory system, except class cephalopoda
Open
Mollusks have an open circulatory system - (mixed interstitial fluid and blood plasma) and yes, they do have a heart. Source: Biology Major
Arthropods and most mollusks have an open circulatory system.
most animilia in phylum mollusca have an open ciculatory system along with a false ceolom
through their open circulatory system
circulatory system
1. pila globosa 2. unio 2.
coelum