Giant roundworm, light micrograph

Giant roundworm, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Giant roundworm. Light micrograph of a transverse section through a male giant roundworm (Ascaris lumbricoides). The body is covered in a thick cuticle (brown), which is secreted by the underlying hypodermis (black). Below this are layers of muscle (pink). The gut is at centre. It is surrounded by several circular testes undergoing spermatogenesis (sperm production). Magnification: x4 when printed at 10 centimetres wide.

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Keywords: animal, ascarid, ascaris lumbricoides, biological, biology, cut out, cuticle, endoparasite, fauna, giant roundworm, gut, hypdermis, intestine, invertebrate, light micrograph, light microscope, male, nature, nematode, no-one, nobody, parasite, parasitic, pathogen, roundworm, sectioned, sperm, testes, testis, transverse section, white background, wildlife, worm, zoological, zoology

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