A parasite that lives inside the body of its host organism.
From Greek 'ento-' (inside), 'para-' (alongside), and 'sitos' (food). A taxonomic term from parasitology established in the 19th century.
Tapeworms are classic entoparasites—they can grow to be 30 feet long inside your gut while stealing your nutrients, and you might not even know they're there.
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