An open circulatory system.
An open circulatory system.
Open
well clam and squid take different water and tiny and big count
A closed circulatory system
Closed Circulatory system
They have a closed circulatory system.
closed circulatory system
Closed circulatory system I believe.
They have a closed circulatory system.
closed circulatory system.
closed circulatory system.
earthworms have a closed circulatory system