Parasitic roundworm, light micrograph

Parasitic roundworm, light micrograph

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Parasitic roundworm. Light micrograph of a section through a female Ascaris lumbricoides parasitic roundworm. The outermost layer of the worm (orange) is the cuticle. Beneath the cuticle is a layer of muscle (red), used for locomotion. The worm's gut is the curved area (red) at centre. The yellow spheres are ovaries and the large red spheres are the worm's two wombs (uteri). A. lumbricoides is a parasite of the human intestine. Females can lay up to 200,000 eggs per day, which are excreted in the faeces and ingested by a new host through contaminated water or food. Infection causes abdominal pain, vomiting, diarrhoea and peritonitis. Magnification: x13 when printed at 10 centimetres wide.

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Keywords: adult, anatomical, anatomy, animal, ascaris lumbricoides, biological, biology, cross section, cross-section, cut out, cut-out, cuticle, cutout, digestive system, fauna, female, gut, guts, invertebrate, invertebrates, light micrograph, light microscope, lm, medical, medicine, muscle, muscles, nature, nematoda, nematode, organ, ovaries, ovary, parasite, parasitic, parasitology, pseudocoel, reproduction, reproductive system, roundworm, section, sectioned, uteri, uterus, wildlife, womb, wombs, zoological, zoology

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