False-colour SEM of thread worms

False-colour SEM of thread worms

Z180/0043 Rights Managed

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Credit: EDWARD GRAY/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph (SEM) of threadworms Trichostrongylus vitrinus in the anterior small intestine of a sheep. Threadworms (or roundworms) belong to the phylum Nematoda. The picture shows threadworms on the surface of & burrowing through & damaging the gut wall. They have an elongated, cylindrical body, pointed at both ends, the posterior being more pointed than the anterior. The body is covered with a thick, tough cuticle secreted by the underlying ectoderm. Under this is a longitudinal muscle layer divided into 4 lengthwise bands, which may be seen in the picture as light lines running along the body. Magnification: x 20 at 35mm size. Original is BW print Z180/038.

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Keywords: animal, false-coloured, invertebrate, invertebrates, nature, nematoda, nematode, roundworm, sheep, threadworm, trichostrongylus vitrinus, wildlife, zoology

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