closed
Humans have a closed circulatory system, in which blood is pumped by the heart through dedicated vessels, where it stays contained, as opposed to an open circulatory system (usually found in invertebrates) where blood is pumped out of the heart and vessels.
Amphibians have closed circulatory system Closed
closed circulatory system (double circulatory system)
Yes it has a closed circulatory system
closed circulatory system
Sea otters have a closed circulatory system.
Platypuses have a closed circulatory system.
closed circulatory system.
squids have closed closed circulatory systems
no
Brown bear have a close circulation system
closed circulatory system