Acanthocephalans require two hosts to complete the life cycle. The young are parasitic in arthropods and the adults, which are typically 1–2 cm (0.4–0.8 in) long and have an elongated, cylindrical body, are parasitic in vertebrates (especially fish), living in the digestive tract. As in the case of tapeworms, acanthocephalans have no gut and absorb nutrients directly from the host's gut through the tegument. About 1,150 species are known.
Related category• ZOOLOGY
Home • About • Copyright © The Worlds of David Darling • Encyclopedia of Alternative Energy • Contact