Although they are related, the digestive system of an earth worm and ascaris are very different. why do you think that is?

Although Ascaris sp. and Earthworms are both nematodes, they have different digestive system. An earthworm has pharynx, esophagus, crop, intestine and gizzard. While the ascaris has only mouth, pharynx, intestine and rectum. It is because of their diet, or the type of food they ingest. The earthworms eat on sediments while an Ascaris sp. is a parasite of the intestine in humans and other animals.

If you want to know how it looks outside of your body then that's when your fingers are wrinkled like if you soak your hands in water or take a long shower or bath that could be when water is entering your cells.
Hope this helps!