Earthworms do not have a skeletal system, they dont have an exoskeleton or endoskeleton. They keep their body structure with a fluid filled body cavity that allows movement.It is covered by over a 100 segments. Humans have a endoskeleton and are not segmented. These systems have nothing in common. 



The earthworm has a closed circulatory system and so do humans. Blood travels to the posterior end through a ventral vessel. It returns to the anterior end through a dorsal blood vessel. Humans also send blood throughout the body through blood vessels. However the earthworm has 5 hearts and the human only has one, four chambered heart.​



The skin of the earthworm contains many small blood vessels where carbon dioxide and oxygen go through into the body. The skin needs to be moist for this to happen. Humans breathe through their mouth, not their skin and humans do not need to be moist in order to breathe. However, they both exchange the same gases. 



Earthworms ingest soil. The soil goes down the mouth, down the esophagus, stored in the crop, and broken down in the gizzard. Then the intestine takes the nutrients and transfers it into the blood. The wastes are eliminated out the anus. Humans do not consume soil, and they have a stomach and not a crop or gizzard however we have a mouth, esophagus, intestine, and anus.



The earth worm has a ventral nerve cord that has connects to a chain of ganglion, there is one on each segment. The ganglion has nerves that send impulses to muscles. The worm has a brain that processes chemicals, light, touch, temperature, moisture, and vibrations. Humans have a brain and nerves, but they are vertebrates and have a central nervous system with ears, eyes, a nose, and taste buds.