yes
Yes, they have a closed circulatory system, meaning that their blood is always contained by the heart or blood vessels.
closed
the dorsal vessel
Some annelid species live in other invertibrate bodies such as the sponge.
closed circulatory system (double circulatory system)
They're both the circulatory system.
Amphibians have closed circulatory system Closed
no
The circulatory system
open circulatory systemclosed circulatory system.
The cadiovascular system, sometimes called the circulatory system when it includes the lymphatic system.
Well,circulatory system is made up of BLOOD and heart.
The annelids are segmented worms. Although some annelids have appendages and primitive sight organs (photo-reactive pigment spots), earthworms do not. Earthworms do, however, have the typical annelid neural ganglia, and the annelid circulatory system, including the aortic arches that function as the worm's heart. And, of course, earthworms are segmented.