Squid's have complex, closed circulatory systems. They have three hearts; two of the hearts pump blood to the gills. Once the blood has circulated through the gills it is then directed to the main heart to be pumped to the rest of the body.
The octopus has a closed circulatory system, which means that all their blood is confined to vessels.
An open circulatory system.
A closed circulatory system
Closed Circulatory system
They have a closed circulatory system.
closed circulatory system
well clam and squid take different water and tiny and big count
Closed circulatory system I believe.
They have a closed circulatory system.
closed circulatory system.
closed circulatory system.
earthworms have a closed circulatory system
earthworms have a closed circulatory system