Roundworms are parasites. They use the human body to stay alive, feed and reproduce. If a lot of eggs have been swallowed, or if the worms move from the small intestine to other parts of the body, they can cause serious complications, such as a bowel obstruction.
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Answer:
Roundworms are parasites. They use the human body to stay alive, feed and reproduce. If a lot of eggs have been swallowed, or if the worms move from the small intestine to other parts of the body, they can cause serious complications, such as a bowel obstruction.