The circulatory system can be open or closed, it depends on your species/ organism
open It is an open circuit, as the vessels dont meat each other they have a start and an end, but a closed system as it has vessels that carry the lymph.
Mammals have a closed circulatory system because it pumps blood into your body/organs which cant flow in all at once.
Audrey Mays
7th grade
It is closed. It is closed.
closed
Amphibians have closed circulatory system Closed
closed circulatory system
closed circulatory system
open circulatory systems
Platypuses have a closed circulatory system.
They have open circulatory system.
squids have closed closed circulatory systems
closed!
Closed
closed.
Closed
closed