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.
Humans have a closed circulatory system. All the blood is contained within the vessels.
Humans, i believe, have closed circulatory systems.
closed circulatory system because they need the oxygen--flying
like all insects, they all have OPEN circulatory system
A fish has a closed circulatory system.
closed
Closed
no
squids have closed closed circulatory systems
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=)
Most mollusks have an open circulatory system, except class cephalopoda
In a closed circulatory system, the circulatory fluid remains within blood vessels at all points in the circulatory system. In an open circulatory system, the circulating fluid enters a sinus at least at one point in the circulating system and thus comes in direct contact with the tissues.
Amphibians have closed circulatory system Closed
closed circulatory system
Platypuses have a closed circulatory system.
They have open circulatory system.
They have a closed circulatory system.
No, open circulatory system
No, they have open circulatory system.
closed circulatory system
no
squids have closed closed circulatory systems
The grasshopper has an open Circulatory system.
open circulatory systems