closed circulatory system
closed. Open circulatory systems are common in athropods, such as scorpions and insects, but not of mammals. They are when the body lacks blood vessels but has blood throughout the entire cavity of the body. Mammals have closed circulatory systems, as they contain blood vessels.
Earthworms have a closed circulatory system. Blood is pumped throughout its body by ringed blood vessels. An open circulatory system is not contained in vessels. In a closed circulatory system oxygen is carried in blood! hope this helps=)
Amphibians have closed circulatory system Closed
The circulatory system can be open or closed, it depends on your species/ organism
closed circulatory system
no they dont. They have a closed circulatory system because they are so long.
open circulatory systems
Platypuses have a closed circulatory system.
A humans circulatory system is closed. Large creatures tend to have a closed system, while smaller creatures like insects and crustaceans have open circulatory systems. Closed is when there are vessels and the blood stays there. Open is when blood floats around the body. Hope it helps:)
They have open circulatory system.
squids have closed closed circulatory systems
closed!