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30.5 MB (31.0 compressed)
3772 x 2829 pixels
32.0 x 23.9 cm ⏐ 12.6 x 9.4 in (300dpi)
JANNICKE WIIK-NIELSEN / SCIENCE PHOTO LIBRARY JANNICKE WIIK-NIELSEN / SCIENCE PHOTO LIBRARY
Coloured scanning electronmicrograph (SEM) of the surface of a tapeworm (Eubothrium crassum). E. crassum is a widely distributed intestinal parasite of Atlantic salmon (Salmo salar L.), brown trout and sea trout (Salmo trutta). The basic structure of an adult tapeworm consists of a head (scolex), a neck and a chain of segments (proglottids) which possess a protective tegument. As tapeworms do not have a gut, all nutrient acquisition occurs through the tegument. Microvilli or microtriches enlarge the surface area of the tegument and aid nutrient uptake. Magnification: x1490 when printed at 10cm wide.
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