You might be asked to provide a sample of poo so it can be tested for worm eggs. It does not matter which type of worm you have – all worm infections are treated in a similar way. So the researchers concluded that the only way the sperm made it to the head is by the worms stabbing themselves in the noggin with their, um, "copulatory organ." The sperm then traveled downward through the body toward the eggs.Paulo Oliveira / Alamy Stock Photo *%26restriction%3D%26random%3D%26ispremium%3D1%26flip%3D0%26contributorqt%3D%26plgalleryno%3D%26plpublic%3D0%26viewaspublic%3D0%26isplcurate%3D0%26imageurl%3D%26saveQry%3D%26editorial%3D1%26t%3D0%26edoptin%3D Treatment to get rid of worms The flatworms have a "needle-like copulatory organ" that they use to inject their sperm during reproduction. The researchers later noticed that some of these transparent worms, the isolated ones, didn't carry sperm in the rear portion of their bodies, but instead had most of their sperm in the front part of their bodies closer to their head. Researchers set up a test to see how these creatures reproduce asexually by placing them in a manipulated social environment in which some of the flatworms would be forced to resort to their "selfing mechanism," according to the study's abstract. Some of these little flatworms have male and female sets of genitalia, and if they can't find a flatworm to mate with, they will inseminate themselves, a practice also known as "selfing." Flatworms of the Macrostomum hystrix variety only resort to injecting themselves as a backup plan.
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