Arthropods have an open circulatory system, with organs in the internal body cavity (hemocoel) and cells bathed in hemolymph. The fluid drains into open pores for recirculation usually by a dorsal tube acting in the role of a heart.
Not all arthropods use hemolymph for oxygenation; insects for example oxygenate tissues directly via tubules connected through vents (spiracles) to the atmosphere.
Hookworms, being Nematodes, have no circulatory system at all.
Flatworms have an open circulatory system.
Annelids have closed circulatory systems.
No, planarians don't have an open circulatory system. They don't have a circulatory system at all. Cells diffuse oxygen and carbon dioxide in and out through the skin.
neither. it doesnt have one
Open
NEPO
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=)
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.
Most mollusks have an open circulatory system, except class cephalopoda
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, they have open circulatory system.
No, open circulatory system
closed circulatory system
no
squids have closed closed circulatory systems
The grasshopper has an open Circulatory system.
open circulatory systems