if they didn't, how would they absorb blood from external sources?
though, if the blood enters their circulatory system is another question.
Leeches has a closed circulatory system just like other animals. They usually circulate foods and gases through the coelomic fluids in their bodies.Ê
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