They are not. Why would you that they are similar? They are not even in the same phylum.
The Brain or Ganglia of an earthworm helps carry out all of the earthworm's body functions such as movement... similar to humans.
They both move by contraction and expansion of the body.
The gizzard is a digestive organ that helps breakdown food in the earthworm. similar to the turkeys gizzard. The turkey also has a gizzard that serves the same purpose.
An earthworm does not have any heart at all. But they do have an organ that acts similar to a heart and is usually called aortic arc.
A- fish and frog.
Hedgehogs and echidnas show convergent evolution. Despite being far apart, they ended up looking very similar. Like sharks and dolphins.
Hedgehogs are not a part of the natural wildlife anywhere in Pennsylvania. With the exception of a zoo or similar business, they are also basically illegal to keep as pets, as well. It's not to say there aren't ANY hedgehogs in Pennsylvania. It's just that what is there is very limited.
Earthworm are like human cause they have a complete losed circulatory system. The earthworm has red blood that contains respiratory pigment similar to hemocfokin. External respiration in human must be moist and an earthworm keep its body surface.
The collective noun for hedgehogs is a "prickle." This term reflects their spiny appearance, as hedgehogs are covered in quills. When referring to a group of hedgehogs, you can say "a prickle of hedgehogs."
hedgehogs
The collective nouns are an array of hedgehogs and a prickle of hedgehogs.
Moles and hedgehogs are not closely related, but they do share some similarities as small, burrowing mammals. Moles belong to the family Talpidae, while hedgehogs are part of the Erinaceidae family. Both animals have adaptations for digging and a similar insectivorous diet, but their evolutionary paths diverged millions of years ago. Thus, while they may appear somewhat similar in behavior and habitat, they are distinct species with different biological classifications.