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Preserved Pig Roundworm (Ascaris lumbricoides) for dissection is an intestinal parasite of hogs and humans and representative of the Nematode phylum. Ascaris has separate sexes.

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Ascaris lumbricoides. Intestinal parasite of hogs and humans and representative of the Nematode phylum. Ascaris has separate sexes with the male being shorter and thinner with a sharply curved posterior. Specimens supplied are approximately ten percent male. Sizes range is 6–10 inches for males and 8–12 inches for females.