Earthworms have closed Circulatory systems, which consist of aortic arches, dorsal and ventral blood vessels. The aortic arches are like human hearts, and Earthworms have 5 pairs of them. The aortic arches have the responsibility of pumping blood into the dorsal and ventral blood vessels. The dorsal blood vessels carry blood to the front of the Earthworms' body while the ventral blood vessels carry blood to the back.
Perch, a kind of fish, have closed circulatory systems. These contain the heart, which pumps blood, arteries which carry blood from the heart to different parts of the body, and veins which carry blood from the body to the heart.
Arthropod Integument System
Earthworm picture found here; http://cmapspublic2.ihmc.us/rid=1210867176738_1898654952_31839/EarthWorm%20Dissection%20Image%20heart%20visible.jpg
Arthropod picture found here; http://highered.mcgraw-hill.com/sites/dl/free/0072919345/63803/0606al.jpg