The circulatory system can be open or closed, it depends on your species/ organism
Amphibians have closed circulatory system Closed
closed circulatory system
closed circulatory system
open circulatory systems
Platypuses have a closed circulatory system.
Closed
closed.
Closed
closed!
No, they have open circulatory system.
No, open circulatory system
They have a closed circulatory system.